资源简介

学校:___________姓名：___________班级：___________考号：___________
Unit6 Sunshine for all
重点语法：it固定句型的用法精讲练
语法知识精讲
一、It作形式主语
1. It + be + 形容词 + (for sb) + to do sth
表示"做某事(对某人来说)是...的"
- It is important to learn English well. (学好英语很重要)
- It was difficult for me to solve the problem. (对我来说解决这个问题很难)
2. It + be + 形容词 + that从句
表示"...是...的"
- It is obvious that he is lying. (很明显他在说谎)
- It's strange that she didn't call. (奇怪的是她没打电话)
3. It + be + 名词 + that从句
- It's a pity that you can't come. (真遗憾你不能来)
- It's no surprise that he failed the exam. (他考试不及格并不奇怪)
4. It + 动词 + that从句
常用动词：seem, appear, happen, turn out等
- It seems that he knows the truth. (他似乎知道真相)
- It turned out that I was wrong. (结果证明我错了)
二、It作形式宾语
1. 主语 + 动词 + it + 形容词/名词 + to do/that从句
常用动词：find, think, consider, make, feel等
- I find it hard to believe his story. (我发现很难相信他的故事)
- He made it clear that he wouldn't help. (他明确表示不会帮忙)
三、强调句型：It is/was...that/who...
用于强调句子的某一成分(主语、宾语、状语等)
- It was Tom who broke the window. (强调主语：是汤姆打破了窗户)
- It is English that I want to learn. (强调宾语：我想学的是英语)
- It was in Paris that they met. (强调地点状语：他们是在巴黎相遇的)
四、其他常见It固定句型
1. It takes (sb) + 时间 + to do sth
- It takes me an hour to get to work. (我上班要花一小时)
2. It is/was + 时间 + since...
- It's three years since we last met. (自从我们上次见面已经三年了)
3. It is (high/about) time + that从句(虚拟语气)
- It's time that we went home. (我们该回家了)
4. It looks/seems as if...
- It looks as if it's going to rain. (看起来要下雨了)
语法知识精练
一、单项选择（每小题2分，满分80分）
1．It ________ that the new library will be opened next month.
A．is reported B．reports C．reported D．was reported
2．It is ________ Daniel to work out such a difficult maths problem in ten minutes.
A．clever of B．careful of C．useful for D．proper for
3．It is not clever ________ teenagers to be crazy about TikTok. It is more important ________ them to read books.
A．of; of B．of; for C．for; of D．for; for
4．—It was kind ________ Zong Qinghou to help people with trouble in their daily life.
—Yes, he was always kind ________ everyone. So he is widely loved by people all over China.
A．for; for B．for; to C．of; for D．of; to
5．It’s important ________ the government ________ basic education for children in poor areas.
A．of; to provide B．of; provide C．for; to provide D．for; to providing
6．It is selfish ________ Tom ________ his great ideas with us.
A．for; to share B．of; to share C．for; not to share D．of; not to share
7．It’s good for us to ________ a good habit of brushing teeth in the childhood.
A．developing B．show C．develop D．showing
8．It is cruel ________ those hunters ________ elephants just for their ivory.
A．of, to kill B．for, killing C．for, to kill D．of, killing
9．It is hard for them ________ such a high mountain.
A．climbed B．to climb C．climb D．climbing
10．It’s time for us ________ hiking. Let’s ________ to the forest.
A．to go; go B．to go; to go C．go; go D．going; go
11．It’s clever _________ you to help me work out the plan.
A．of B．for C．to D．at
12．It is wrong ________ a student not to do his homework carefully. You must work hard.
A．with B．to C．of D．for
13．—Did you feel ________ was wrong of Jack to hide the comic books
—Yes. It is important ________ a boy to learn to share.
A．that; of B．that; for C．it; of D．it; for
14．It’s really foolish ________ Jim ________ an umbrella with him in such rainy weather.
A．for; to take B．of; to take C．for; not to take D．of; not to take
15．—Your room is in a mess. It’s time ________.
—OK, Mum.
A．tidying it up B．to tidy up it C．tidying up it D．to tidy it up
16．My daughter think ________ necessary ________ to take so many dancing classes.
A．that; for her B．it; of her C．that; of her D．it; for her
17．It ________ over 10 years since my grandpa ________.
A．was; died B．was; has been dead C．has been; died D．is; has died
18．He thought ________ a good way to relax himself.
A．it B．it’s C．that D．that’s
19．It’s 15 years since she _________.
A．has been married B．has got married C．got married D．has married
20．It’s the third time you ________ late for school this week.
A．are B．have been C．to be D．were
21．I think ________ necessary ________ to take more exercise.
A．it’s; for Jim and me B．it’s; to Jim and me C．that; for Jim and I D．that’s; to Jim and I
22．—It’s clever ________ you to work out all the Maths problems. Can you give me some tips
—Well. It’s necessary ________ us to do more exercises.
A．for; for B．of; for C．of; at D．for; of
23．It’s impolite _________ you to shout at your parents. It’s important _________ you to learn to be polite.
A．for; for B．of; for C．of; of D．for; of
24．It’s a quarter to seven! Go to wake ________. It’s time ________ school .
A．up him；for B．him up；to C．him up；for D．up him；to
25．—When did Mary ________ John
—It ________ three years since they fell in love with each other.
A．marry; is B．get married with; has been
C．get married to; was D．marry to; is
26．—It’s clever ________ her to come up with ________ many good ideas.
—Never look down upon anyone!
A．for; as B．of; such C．for; such D．of; so
27．—It was brave ________ Mike to swim in the river alone.
—But I think it really dangerous ________ him to do so.
A．of; for B．of; of C．for; of D．for; for
28．—Her operation will cost a lot. It’s necessary ________ us to give a helping hand.
—It’s kind ________ you to say so. And I quite agree with you.
A．of; for B．for; of C．for; for D．of; of
29．It’s polite ________ us _________quiet while eating.
A．for, to keep B．of, to keep C．for, keep D．of, keep
30．— It’s necessary ___________ break any of the rules at school.
— Of course, we should obey all the rules.
A．for us don’t B．of us don’t C．for us not to D．of us not to
31．—James ate all the cake. I think it is wrong ________ him to refuse to share.
—Really I feel ________ is hard to believe. He is usually generous.
A．of; it B．for; him C．for; it D．of; him
32．It is kind ________ the young man ________ blood to people in need.
A．for; to donate B．of; donating
C．of; to donate D．for; donating
33．—It was careless ________ Daniel to leave the lights on again.
—Yes. Let’s turn them off.
A．of B．for C．to D．by
34．—It’s polite ________ Chen Dan to offer his seat to the elderly when taking a bus.
—Yes. I think it’s necessary ________ us to learn from him.
A．for; for B．for; of C．of; of D．of; for
35．It was necessary __________ these volunteers __________ training before doing the tasks.
A．of; to receive B．of; receive C．for; to receive D．for; receive
36．It is brave _________ the man to take part in the competition.
A．of B．for C．to D．with
37．—You’d better ________ some drinks before the film begins.
—But I think it’s better ________ anything while watching the film.
A．buy; not have B．to buy; not to have C．to buy; not have D．buy; not to have
38．It’s generous ________ him to donate money to the poor. It’s really meaningful ________ us students to learn from him.
A．of; of B．for; for C．for; of D．of; for
39．It’s not ________ him to help these children with intellectual disabilities because he has received little training so far.
A．simple for B．simple of C．hard for D．hard of
40．—________ did the war between Russia and Ukraine break out
— Let me see. It ________ a long time since it broke out.
A．When; was B．When; is
C．How long; was D．How long; is学校:___________姓名：___________班级：___________考号：___________
Unit6 Sunshine for all
重点语法：it固定句型的用法精讲练
语法知识精讲
一、It作形式主语
1. It + be + 形容词 + (for sb) + to do sth
表示"做某事(对某人来说)是...的"
- It is important to learn English well. (学好英语很重要)
- It was difficult for me to solve the problem. (对我来说解决这个问题很难)
2. It + be + 形容词 + that从句
表示"...是...的"
- It is obvious that he is lying. (很明显他在说谎)
- It's strange that she didn't call. (奇怪的是她没打电话)
3. It + be + 名词 + that从句
- It's a pity that you can't come. (真遗憾你不能来)
- It's no surprise that he failed the exam. (他考试不及格并不奇怪)
4. It + 动词 + that从句
常用动词：seem, appear, happen, turn out等
- It seems that he knows the truth. (他似乎知道真相)
- It turned out that I was wrong. (结果证明我错了)
二、It作形式宾语
1. 主语 + 动词 + it + 形容词/名词 + to do/that从句
常用动词：find, think, consider, make, feel等
- I find it hard to believe his story. (我发现很难相信他的故事)
- He made it clear that he wouldn't help. (他明确表示不会帮忙)
三、强调句型：It is/was...that/who...
用于强调句子的某一成分(主语、宾语、状语等)
- It was Tom who broke the window. (强调主语：是汤姆打破了窗户)
- It is English that I want to learn. (强调宾语：我想学的是英语)
- It was in Paris that they met. (强调地点状语：他们是在巴黎相遇的)
四、其他常见It固定句型
1. It takes (sb) + 时间 + to do sth
- It takes me an hour to get to work. (我上班要花一小时)
2. It is/was + 时间 + since...
- It's three years since we last met. (自从我们上次见面已经三年了)
3. It is (high/about) time + that从句(虚拟语气)
- It's time that we went home. (我们该回家了)
4. It looks/seems as if...
- It looks as if it's going to rain. (看起来要下雨了)
语法知识精练
一、单项选择（每小题2分，满分80分）
1．It ________ that the new library will be opened next month.
A．is reported B．reports C．reported D．was reported
【答案】A
【详解】句意：据报道，新图书馆将于下个月开放。
考查时态及It固定句式。It is/was reported that“据报道”，是固定句式；根据“that the new library will be opened next month”并结合选项可知，此处应是指现在报道将来发生的事情，句子时态为一般现在时，A项符合。故选A。
2．It is ________ Daniel to work out such a difficult maths problem in ten minutes.
A．clever of B．careful of C．useful for D．proper for
【答案】A
【详解】句意：丹尼尔真聪明，十分钟就做出了这么难的数学题。
考查形容词辨析和it固定句型。clever聪明的；careful小心的；useful有用的；proper 适合的；“It is+形容词+for sb.+to do sth.”意为“对某人来说做某事怎么样”，该句型中的形容词常与事物的特征有关；“It is+形容词+of sb.+to do sth.”表示“某人做某事怎样”，该句型中的形容词常与人的性格特点有关。由“ work out such a difficult maths problem in ten minutes.”可知，此处强调丹尼尔很聪明，“clever”说明人本身具有的品质特征，故介词应用“of”。故选A。
3．It is not clever ________ teenagers to be crazy about TikTok. It is more important ________ them to read books.
A．of; of B．of; for C．for; of D．for; for
【答案】B
【详解】句意：青少年对抖音痴迷是不明智的。对他们来说读书更重要。
考查介词用法。of……的；for对于。It’s + adj. + (of/for) sb. to do sth. 译作“某人做某事是……的”，当形容词是可修饰人的形容词，即sb.和adj有主系表关系时，sb.前用of；当形容词修饰事情，sb.前用for；第一个空前的“clever”是说明“teenagers”的特征，用of；第二个空前的“important”是说明“to read books”的性质，用for。故选B。
4．—It was kind ________ Zong Qinghou to help people with trouble in their daily life.
—Yes, he was always kind ________ everyone. So he is widely loved by people all over China.
A．for; for B．for; to C．of; for D．of; to
【答案】D
【详解】句意：——宗庆后在日常生活中帮助有困难的人，这是一种仁慈。——是的，他对每个人都很好。因此他受到了全中国人民的广泛喜爱。
考查介词辨析。for为了；of……的；to对于。第一个空是固定句式：It is+形容词+of sb to do sth.“某人做某事是……的。”，这里的形容词是修饰人的品格或性格，kind“善良的”，是修饰人的品质的形容词，故第一空填of。be kind to sb“对某人善良”，故第二空填to，故选D。
5．It’s important ________ the government ________ basic education for children in poor areas.
A．of; to provide B．of; provide C．for; to provide D．for; to providing
【答案】C
【详解】句意：政府为贫困地区的儿童提供基础教育是很重要的。
考查介词和非谓语动词。句型It is+adj.+of/for sb.+to do sth.表示“做……对某人而言是……的”，如果形容词是描述人的品质的，要用介词of；若形容词描写事物性质，则用for；形容词“important”与事物性质相关，介词应用for。to后接动词原形，而不是动名词。故选C。
6．It is selfish ________ Tom ________ his great ideas with us.
A．for; to share B．of; to share C．for; not to share D．of; not to share
【答案】D
【详解】句意：汤姆不与我们分享他的好想法是自私的．
考查固定句型：it is+形容词+for sb.+to do sth.表示事物特征特点，it is+形容词+of sb. +to do sth.表示人物的性格；根据句意“汤姆不与我们分享他的好想法是自私的”，本题是说人的性格，同时后面selfish是自私的，应该是不分享，故选D。
7．It’s good for us to ________ a good habit of brushing teeth in the childhood.
A．developing B．show C．develop D．showing
【答案】C
【详解】句意：从小养成刷牙的好习惯对我们有好处。
考查it的固定句型及动词辨析。developing逐渐养成，现在分词及动名词；show显示，动词原形；develop逐渐养成，动词原形；showing显示，现在分词及动名词。根据空后的“a good habit of brushing teeth”并结合选项可知，此处指养成刷牙的好习惯；分析句子结构可知，此处为固定句型“It’s+adj.+for sb. to do sth.”，意为“对某人来说，做某事是……的”。故选C。
8．It is cruel ________ those hunters ________ elephants just for their ivory.
A．of, to kill B．for, killing C．for, to kill D．of, killing
【答案】A
【详解】句意：那些猎人为了象牙而杀害大象是残忍的。
考查it固定句型。结合“cruel”可知，此处是it is+形容词+of+sb+to do sth结构，是用于强调某人性格或品性的。故选A。
9．It is hard for them ________ such a high mountain.
A．climbed B．to climb C．climb D．climbing
【答案】B
【详解】句意：他们爬这么高的山很难。
考查动词不定式。固定句型It is + 形容词 + for sb. to do sth.“对某人来说某事是怎么样的”，不定式作真正的主语，故选B。
10．It’s time for us ________ hiking. Let’s ________ to the forest.
A．to go; go B．to go; to go C．go; go D．going; go
【答案】A
【详解】句意：是我们去远足的时候了。咱们去森林吧。
考查it固定句型与词组搭配。“It’s time for sb. to do sth.”是固定句型，意为“是某人做某事的时候了”，所以第一空用to go；“Let’s + 动词原形”是固定用法，表示“咱们做某事吧” ，所以第二空用go。故选A。
11．It’s clever _________ you to help me work out the plan.
A．of B．for C．to D．at
【答案】A
【详解】句意：你真聪明，帮我制定了这个计划。
考查It句型。It is+形容词+for sb to do sth，表示“对某人来说做某事怎么样”，形容词指的是做这件事怎么样；It is+形容词+of sb to do sth，表示“做了某事，某人怎么样”，形容词指的是这个人怎么样。根据“clever”可知，你太聪明了，介词用of。故选A。
12．It is wrong ________ a student not to do his homework carefully. You must work hard.
A．with B．to C．of D．for
【答案】C
【详解】句意：学生不认真做作业是不对的。
考查介词辨析。with带有；to到；of……的；for对于。固定句式：It is wrong of sb to do sth“某人做某事是错误的”，故选C。
13．—Did you feel ________ was wrong of Jack to hide the comic books
—Yes. It is important ________ a boy to learn to share.
A．that; of B．that; for C．it; of D．it; for
【答案】D
【详解】—— 你觉得Jack把漫画书藏起来是错误的吗？—— 是的。对一个男孩来说学会分享是很重要的。
考查it的用法和介词。 根据“It is adj. to do sth.”可知， 第一空it符合句意；根据“important”可知，修饰的是“learn to share”这件事，因此用介词for“对……来说”。故选D。
14．It’s really foolish ________ Jim ________ an umbrella with him in such rainy weather.
A．for; to take B．of; to take C．for; not to take D．of; not to take
【答案】D
【详解】句意：吉姆真傻，在这样的雨天不带雨伞。
考查it句型和介词辨析。固定短句型It is+形容词+for/of sb to do sth“对某人来说做某事是……的”。此处当形容词形容事物的性质时，应用for；当形容词是描述人的性格、品质等时，应用of。foolish在此处是修饰吉姆很傻，应用of。再根据“in such rainy weather.”可知下雨天不带伞是很傻的，故选D。
15．—Your room is in a mess. It’s time ________.
—OK, Mum.
A．tidying it up B．to tidy up it C．tidying up it D．to tidy it up
【答案】D
【详解】句意：——你的房间乱七八糟。该收拾了。——好的，妈妈。
考查it句型和动词短语。固定句型It’s time to do sth“该是做某事的时候了”。排除AC选项。tidy up是“动副”短语，代词作宾语时，需放中间，故选D。
16．My daughter think ________ necessary ________ to take so many dancing classes.
A．that; for her B．it; of her C．that; of her D．it; for her
【答案】D
【详解】句意：我女儿认为她有必要上这么多舞蹈课。
考查it的固定句型。根据“think”、“necessary”和“to take”可知，think it+形容词+for sb. to do sth.“认为做某事对某人来说是……的”，此处it作形式宾语，动词不定式短语为句子真正的宾语，故第一空应用it，第二空应用for her。故选D。
17．It ________ over 10 years since my grandpa ________.
A．was; died B．was; has been dead C．has been; died D．is; has died
【答案】C
【详解】句意：我爷爷去世已经十多年了。
考查it固定句型。分析句子，其结构为It has been/is+时间段+since+从句(一般过去时)表示“自从……已经……年了”，故选C。
18．He thought ________ a good way to relax himself.
A．it B．it’s C．that D．that’s
【答案】B
【详解】句意：他认为这是一个放松自己的好方法。
考查it固定句式。thought后接的是省略that的宾语从句，从句是固定句式：it’s a good way to do sth“做某事的好方法”，故选B。
19．It’s 15 years since she _________.
A．has been married B．has got married C．got married D．has married
【答案】C
【详解】句意：她结婚已经15年了。
考查动词时态。根据题干可知，此处是 It is+时间段+since...“自从……以来有一段时间了”，从句用一般过去时，所以C选项正确，故选C。
20．It’s the third time you ________ late for school this week.
A．are B．have been C．to be D．were
【答案】B
【详解】句意：这是本周的第三次你上学迟到。
考查时态。句型it is+序数词+time+that从句表示“第几次……”，从句时态应用现在完成时。故选B。
21．I think ________ necessary ________ to take more exercise.
A．it’s; for Jim and me B．it’s; to Jim and me C．that; for Jim and I D．that’s; to Jim and I
【答案】A
【详解】句意：我认为我和吉姆有必要多锻炼。
考查it作形式主语。根据“I think ... necessary ... to take more exercise.”可知，该句是省略了that的宾语从句，从句是固定句型“it is+形容词+for sb.+to do sth.”，意为“对某人而言，做某事是……的”，it作形式主语，不定式作真正的主语，sb.用人称代词宾格。故选A。
22．—It’s clever ________ you to work out all the Maths problems. Can you give me some tips
—Well. It’s necessary ________ us to do more exercises.
A．for; for B．of; for C．of; at D．for; of
【答案】B
【详解】——你真聪明，把所有的数学题都解出来了。你能给我一些建议吗？——好的。对我们来说多做练习是很有必要的。
考查介词用法。It’s+形容词+of/for sb.+to do sth.“做……事对某人来说是……”，若形容词修饰事情，用介词for；若形容词修饰人，用介词of。第一空clever修饰人you，所以选用of；第二空necessary修饰事情“do more exercises”，所以选用for。故选B。
23．It’s impolite _________ you to shout at your parents. It’s important _________ you to learn to be polite.
A．for; for B．of; for C．of; of D．for; of
【答案】B
【详解】句意：向你父母大叫是没有礼貌的。学会有礼貌对你来说是重要的。
考查介词。根据“it is形容词（体现人的品质特征）of sb.to do”“it is形容词（形容词是对这件事的评价）for sb to do”，第一空前的形容词“impolite”能体现人的品质特征，所以是of；第二空前的形容词是对这件事的评价，所以是for。故选B。
24．It’s a quarter to seven! Go to wake ________. It’s time ________ school .
A．up him；for B．him up；to C．him up；for D．up him；to
【答案】C
【详解】句意：现在是六点四十五分！去把他叫醒。该是上学的时候了。
考查动词短语和介词辨析。wake up him错误表达，代词应位于动词wake后；wake him up把他叫醒；for为了；to到。根据“wake”可知动词短语wake sb up表示“把某人叫醒”，若“某人”为人称代词，则应将人称代词位于动词后，即wake him up；根据“It’s time”可知此处应用“It’s time for school.”表示“该是上学的时候了。”。故选C。
25．—When did Mary ________ John
—It ________ three years since they fell in love with each other.
A．marry; is B．get married with; has been
C．get married to; was D．marry to; is
【答案】A
【详解】句意：——玛丽什么时候嫁给约翰的？——他们相爱已经三年了。
考查动词短语和固定句型。marry“结婚”，和某人结婚可以用“get married to sb.或marry sb.”，排除选项B和D；再根据“since they fell in love with each other”可知，该句为“it is/has been+一段时间+since+过去时态”句型，表示“自从……有多长时间了”，所以此处用is或者has been，故选A。
26．—It’s clever ________ her to come up with ________ many good ideas.
—Never look down upon anyone!
A．for; as B．of; such C．for; such D．of; so
【答案】D
【详解】句意：——她真聪明，能想出这么多好主意。 ——永远不要轻视任何人！
考查it固定句型和形容词短语。it’s adj. for/of sb. to do sth表示“对某人来说做某事是……的”，当形容词是形容人的时候，用介词of，否则用for，空后是人，所以用of。as作为；such修饰名词；so修饰形容词和副词，so many意为“如此多的……”是固定短语。故选D。
27．—It was brave ________ Mike to swim in the river alone.
—But I think it really dangerous ________ him to do so.
A．of; for B．of; of C．for; of D．for; for
【答案】A
【详解】句意：——迈克很勇敢，一个人在河里游泳。——但我认为他这样做真的很危险。
考查介词辨析。of……的；for对于。本题是It固定句型：It is+形容词+for/of sb.+to do sth.”意为“对某人来说做某事怎么样”。 当形容词常与事物的特征有关，用for。当形容词常与人的性格特点有关，用of。第一空前的形容词brave描述人的品质，故其后用介词of；第二空前的形容词dangerous与事物特指有关，故其后用介词for。故选A。
28．—Her operation will cost a lot. It’s necessary ________ us to give a helping hand.
—It’s kind ________ you to say so. And I quite agree with you.
A．of; for B．for; of C．for; for D．of; of
【答案】B
【详解】句意：——她的手术会花费很多。我们有必要伸出援手。——你这么说真好。我非常同意。
考查介词。It is+形容词+of/for sb to do sth“对某人来说做某事是怎么样的”，for sb与表示事物的特征特点的形容词连用；of sb与表示人物的性格，品德，主观感情或态度的形容词连用。第一个空，形容词necessary“必要的”，修饰事物，用介词for；第二个空，形容词kind“友好的”，表示人的品德，用介词of。故选B。
29．It’s polite ________ us _________quiet while eating.
A．for, to keep B．of, to keep C．for, keep D．of, keep
【答案】B
【详解】句意：我们吃饭时保持安静是有礼貌的。
考查介词和非谓语动词。固定句式：It’s+形容词+for/of sb to do sth，polite是修饰人的形容词，介词用of，动词不定式作主语，故选B。
30．— It’s necessary ___________ break any of the rules at school.
— Of course, we should obey all the rules.
A．for us don’t B．of us don’t C．for us not to D．of us not to
【答案】C
【详解】句意：——我们有必要不违反学校的任何规定。——当然，我们应该遵守所有的规则。
考查it固定句型。固定句型“It is+形容词+for/of sb.+not to do sth.”意为“对某人来说不做某事是怎么样的”，形容词necessary与事物的特征有关，应用介词for。故选C。
31．—James ate all the cake. I think it is wrong ________ him to refuse to share.
—Really I feel ________ is hard to believe. He is usually generous.
A．of; it B．for; him C．for; it D．of; him
【答案】A
【详解】句意：——詹姆斯吃了所有的蛋糕。我认为他拒绝分享是不对的。——真的吗？我觉得很难相信。他通常很慷慨。
考查介词及代词。第一个空，“it is+形容词+of/for sb. to do sth.”对某人来说做某事是…… 。“for sb.”与表示事物的特征特点的形容词连用。“of sb.”与表示人物的性格、品德、主观感情或态度的形容词连用。根据形容词wrong“错的”可知，形容人的行为用介词of。第二个空，“it is+形容词+to do sth.”做某事是……，固定句式，it是形式主语，不定式是真正主语。故选A。
32．It is kind ________ the young man ________ blood to people in need.
A．for; to donate B．of; donating
C．of; to donate D．for; donating
【答案】C
【详解】句意：那个年轻人为有需要的人献血真善良。
考查it固定句型。It’s adj. of sb. to do sth.表示“某人做某事……”，描述某人品格，要用of引出对象，后面动词用不定式形式。故选C。
33．—It was careless ________ Daniel to leave the lights on again.
—Yes. Let’s turn them off.
A．of B．for C．to D．by
【答案】A
【详解】句意：——丹尼尔太粗心了，又没关灯。——是的。让我们把它们关掉。
考查介词辨析。of……的；for为了；to向，朝着；by通过。根据“It was careless ... Daniel to leave the lights on again.”可知，it is adj. for/of sb. to do do sth.“做某事对某人而言是……的/某人做某事是……的”；careless“粗心的”，形容人的性格，介词应用of。故选A。
34．—It’s polite ________ Chen Dan to offer his seat to the elderly when taking a bus.
—Yes. I think it’s necessary ________ us to learn from him.
A．for; for B．for; of C．of; of D．of; for
【答案】D
【详解】句意：——坐公共汽车时，陈丹给老人让座是有礼貌的。——是的。我认为我们有必要向他学习。
考查介词辨析。for对于……来说；of……的。根据“polite”和“Chen Dan”可知，此处应用“It’s+形容词+of sb to do sth”，表示“某人做某事是怎么样的”，用来形容人的品质；根据“necessary”和“us to learn from him”可知，此处应用“It’s+形容词+for sb to do sth”，表示“对某人来说，做某事是怎么样的”，用于形容事物的性质。故选D。
35．It was necessary __________ these volunteers __________ training before doing the tasks.
A．of; to receive B．of; receive C．for; to receive D．for; receive
【答案】C
【详解】句意：对这些志愿者来说在执行任务之前接受培训是很必要的。
考查it固定句型。根据“It was necessary…training before doing the tasks.”可知，本句为“It is+形容词+for sb.+to do sth.”结构，意为“对某人来说做某事怎么样”。因此第一空应用介词for，第二空应用动词不定式。故选C。
36．It is brave _________ the man to take part in the competition.
A．of B．for C．to D．with
【答案】A
【详解】句意：那个人参加比赛是很勇敢的。
考查介词辨析。of……的；for为了；to向，朝着；with和。根据“It is brave ... the man to take part in the competition.”可知，it is adj. of/for sb. to do sth.“某人做某事是……的”；brave形容人的品质，介词用of。故选A。
37．—You’d better ________ some drinks before the film begins.
—But I think it’s better ________ anything while watching the film.
A．buy; not have B．to buy; not to have C．to buy; not have D．buy; not to have
【答案】D
【详解】句意：——你最好在电影开始前买些饮料。——但我认为在看电影的时候最好什么都不要喝。
考查短语辨析。had better do sth.“最好做某事”，had better后跟动词原形，故第一空填buy；而It’s better to do sth.表示“更好做某事”，否定形式在to前面加not，所以第二空填not to have。故选D。
38．It’s generous ________ him to donate money to the poor. It’s really meaningful ________ us students to learn from him.
A．of; of B．for; for C．for; of D．of; for
【答案】D
【详解】句意：他捐款给穷人真是慷慨。对我们学生来说，向他学习真的很有意义。
考查介词辨析。of……的；for为了。在“It’s+形容词+of/for+sb.+to do sth.”结构中，若形容词是描述某人的品质或性格，用介词of；若形容词描述某事物对某人的影响或意义，用介词for。第一空描述“他”的品质，用of；第二空描述“学习”对“我们学生”的意义，用for。故选D。
39．It’s not ________ him to help these children with intellectual disabilities because he has received little training so far.
A．simple for B．simple of C．hard for D．hard of
【答案】A
【详解】句意：对他来说，帮助这些智力残疾的孩子并不简单，因为到目前为止，他几乎没有接受过培训。
考查固定句型和形容词辨析。simple 简单的，容易的；hard困难的。 It’s adj. for sb. to do sth. 表示做某事对某人来说很……，这里的形容词表示做某事的属性；It is+adj.+of sb. +to do sth.表示某人这么做真是太……了，这个形容词是用来形容人的，形容词通常是表示人的性格特点和品质方面的词。此句中simple或hard是表示做某事的属性，用for，排除B和D。由“because he has received little training so far.”可知帮助这些智力残疾的孩子是困难的，由“not”可知simple符合题意，故选A。
40．—________ did the war between Russia and Ukraine break out
— Let me see. It ________ a long time since it broke out.
A．When; was B．When; is
C．How long; was D．How long; is
【答案】B
【详解】句意：——俄罗斯和乌克兰之间的战争是什么时候爆发的？——让我看看。自从它爆发以来，已经有很长时间了。
考查特殊疑问词和be动词。when什么时候；how long多长时间。根据“did”以及短暂性动词“break out”可知不能和how long连用，排除CD选项；第二空是固定句型：It is+时间段+since从句，故选B。

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