【期末语法培优】核心语法之让步状语从句-2025-2026学年九年级全册英语期末核心语法培优北师大版 (含答案解析)

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【期末语法培优】核心语法之让步状语从句-2025-2026学年九年级全册英语期末核心语法培优北师大版 (含答案解析)

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/ 让学习更有效 期末语法培优 | 英语学科
2025-2026学年九年级全册英语期末核心语法培优北师大版
核心语法:让步状语从句
学校:___________姓名:___________班级:___________考号:___________
1.Susan knows a lot about Nanjing, she is new here.
A.so B.though C.and D.but
2._______ it's difficult to make it to the top, I still want to have a try.
A.Because B.As soon as C.Before D.Even though
3. ____ Tina didn't feel well,she went to school.
A.Although B.So C.If D.Because
4. what happens, the fact that Diaoyu Islands belong to China will never change.
A.Because of B.In order to C.Thanks to D.No matter
5. —Did you succeed in getting to the top of the mountain, Kevin
—Yes, we did. ____ it took us three hours to get there.
A.as long as B.as soon as C.even though D.ever since
6.__________ the girl is only ten years old, she can take care of her brother and cook meals every day.
A.If B.Because C.Although D.As
7.Miss Li, as you know, is active all the time, ____ she has not been well these days.
A.although B.so that C.since D.when
8. The fisherman kept working ____ it rained heavily.
A.but B.so C.because D.although
9._________ he is wrong, _________ you should be friendly to him.
A.Although; / B.Although; but C.But; although D./; although
10.The little boy succeeded in reaching the camp, ________ he fell over several times all the way.
A.until B.but C.even though D.so that
11.—I can't still pronounce the word well ________ you teach me a lot.
—Take it easy. Practice makes perfect.
A.but B.whether C.even though D.as soon as
12.I really enjoyed your speech, ______ there were some parts I didn't quite understand.
A.because B.since C.until D.though
13. he is very young, he can do many things.
A.Though,but B.Though, / C.But, /
14. ____ my grandfather is old, he looks very strong and healthy.
A.As B.Although C.Until
15. Life is like climbing a mountain. ____ you feel tired, you will enjoy the beauty at the top of the mountain.
A.Since B.But C.Though
16.________ we face the difficulties of today and tomorrow, I still have a dream.
A.Even though B.As soon as C.As long as D.Ever since
17.___________ the boy is ten years old, __________ he can speak five languages.
A.Although, / B.Although, but C.Although, so D.Although, and
18._____ the little cat has done, it could not jump over that high wall.
A.Whenever B.Wherever C.Whatever
19. I'm hungry, I have some food.
A.Because ;so B.So; because C.Because;/ D./;so
20. I think my junior high school life is enjoyable, ____ I sometimes have some trouble in study.
A.if B.while C.until D.though
21.Mr. Green still went to the meeting he had a bad cold.
A.because B.unless C.though
22.The volunteers continued their work ________ they were very tired.
A.if B.because C.although D.as
23. The teacher still spoke very loudly ____ he had a sore throat.
A.so that B.as soon as C.as long as D.even though
24. ____ the match ended in a loss, everyone felt happy.
A.Because B.Although C.If D.When
25.________ you drive, you must drive carefully.
A.No matter how well B.Even though C.Ever since
26.__________ how busy he is, he is always ready to help others.
A.Thanks to B.No matter C.According to D.Even though
27.—How do you like your new school, Kate
—It is very clean and beautiful _____ it is a bit small.
A.if B.since C.unless D.although
28. ____ my grandfather is 75, he is strong enough to go jogging every day.
A.Because B.Although C.When D.Since
29.Though he was very tired, _______ he had to keep _______ for another two hours.
A./; driving B.but; to drive C./; to drive D.but; driving
30. Many people all over the world want to climb Qomolongma each year, ____ it is very dangerous.
A.if B.while C.though
31.Mark isn't coming to the concert ___________ he has finished his work.
A.so B.when C.although D.because
32.—____ I see the pictures with my father, I can't ____.
—Yes. They always remind you the good memories in the childhood.
A.However; help to cry
B.Whenever; help crying
C.Whatever; help cry
33. American people and British people speak the same language, their cultures are quite different.
A.Since B.If C.Although
34. Dancing on the squares is quite popular among many women, ____the season.
A.whenever B.whatever C.wherever D.whomever
35. ____ this hat looks nice,____ I won't take it. It's too big for me.
A.Because;so B.Because;/ C.Although;but D.Although;/
36. it is raining hard, the farmers are still working on the farm.
A.Although; but B.Because; but C.Although; / D.Because; so
37. —I can't still pronounce the word well ____ you teach me a lot.
—Take it easy. Practice makes perfect.
A.but B.whether C.even though D.as soon as
38.________ Lily is only 13 years old, she knows 2000 English words.
A.While B.Nor C.But D.Although
39.______________ you like swimming ______________ boating, you'll have fun in the water park.
A.Whether; or B.If; but C.Either; or D.Both; and
40.The football match went on, it rained heavily last night.
A.if B.though C.so that D.so
41.______ Lin Feng has to work late, she always wears a smile on her face.
A.Because B. If C.Until D.Though
42.____ life is full of ups and downs, we still should face it with hope and courage.
A.As long as B.Even though C.As soon as D.In order to
43.__________ Liu Xiang couldn't take part in 2008 Olympics, __________ we are still proud of him.
A.Because, so B.Because, / C.Although, / D.Although, but
44.________ how well you know about the city of Chengdu, it is easy for you to find something delicious that you have never eaten.
A.Instead of B.No matter C.Even though
45.—Which teachers will you miss the most after junior high school, Clara
—Ms. Lee. She helped me to work out the answers myself no matter _________ difficult they were.
A.how B.when C.where D.what
46. ____ it was cold and late, they kept working outside.
A.But B.Although C.Because D.So
47.We'll never give up our plan happens.
A.however B.whatever C.whenever D.Wherever
48. ____ the prices are a little higher at that supermarket, we still like to go shopping there.
A.Although B.As long as C.Since
49.Although they feel tired, _____ they still go on working.
A./ B.and C.but D.so
50.Although this meant that people could travel further and faster, ________.
A.and humans continued walking across the globe
B.so these old paths quickly became extremely difficult to use
C.but the inventor probably first used them to transport things
D.transporting large amounts of goods was still a difficult job
参考答案及试题解析
1.B
【解析】A. so所以 B. though 尽管 C. and 和 D. but但是;句意:尽管苏珊是刚到这里,但是她知道很多关于南京的事情。故选B
【点评】连词在中考中涉及到的很多,尤其在宾语从句、状语从句、定语从句中连词是必考点。平时学习过程中,掌握连词的意思,及所表示的关系是至关重要的,这种关系的判断可以通过句子意思的理解来选择恰到的连词。
2.D
【解析】句意:即使很难到达山顶,我仍然想要试试。because因为,引导原因状语从句;as soon as一……就……,引导时间状语从句;before在……以前,引导时间状语从句;even though即使,引导让步状语从句。根据句意可知这是一个让步状语从句,故选D。
【点评】考查连词辨析,常使用的连词应熟练掌握。
3.A
【解析】句意:尽管蒂娜身体不舒服,她还是去上学了。A:虽然,B:所以,C:如果,D:因为,根据Tina didn't feel well,she went to school,可知是让步关系,故用Although引导让步状语从句,故选A。
【点评】考查连词,注意识记Although,让步状语从句的用法。
4.D
【解析】句意:无论发生什么,钓鱼岛属于中国的事实永远不会改变。because of “因为”;in order to “为了”;thanks to “多亏”;no matter “无论”。根据what happens和the fact will never change,可知发生什么,事实都不会改变,此处是让步状语从句,用no matter。 故选D。
【点评】本题考查连词辨析,注意理解选项意思,理解句意。
5.C
【解析】句意:——凯文,你成功登上山顶了吗?—— 是的,我们做到了。尽管我们花了三个小时才到达那里。 as long as 只要; as soon as 一...就...; even though即使,尽管; ever since 自从...以后(直到现在) 。根据语境分析可知,此处表示让步关系,即:"尽管我们花了三小时,但是最后还是成功的做到了",故用even though"即使,尽管",此处引导让步状语从句,符合语境要求,故选C。
【点评】考查连词辨析。注意正确理解选项所给连词的意思以及用法区别,根据题目所给语境选择正确的连词。
6.C
【解析】句意:尽管这个女孩只有10岁,但是她每天能照顾她的弟弟以及做饭。If如果,引导条件状语从句; because因为,引导原因状语从句; although尽管,引导让步状语从句; as因为,引导原因状语从句;结合句意,此处表示10岁的女孩,却能照顾弟弟并做饭,故前后两句表示转折关系,故选C。
【点评】考查连词辨析,注意理解句意,找出句子间的关系。
7.A
【解析】句意:李小姐,你知道的,她一直很活跃,尽管这些天她身体不太好。A. although“尽管”;B. so that“以至于”;C. since“自从”;D. when“当……时候”。结合句意,应为让步状语从句,故选A。
【点评】考查连词辨析,although引导让步状语从句。
8.D
【解析】句意:尽管雨下得很大,渔夫仍继续工作。A. but,但是,表示转折;B. so,所以,表示因果;C. because,因为,表示原因;D. although,尽管,表示让步。前后两分句之间是让步关系,表示尽管雨下得很大,但是渔夫仍继续工作。此处应用连词although来引导让步状语从句。故选D。
【点评】考查连词辨析。注意连词 "although" 用于引导让步状语从句。
9.A
【解析】although的含义为“虽然”,but的含义为“但是”,although与but不能连用,因此A项正确。句意:虽然他是错的,你也应该对他友好些。
【点评】本题重点考查although引导的让步状语从句。易错点是although与but连用,做题时注意although与but不能连用。
10.C
11.C
12.D
【解析】A. because因为 B. since 自从 C. until 直到 D. though尽管,虽然;句意:我真的喜欢你的演讲,虽然有一些部分我不很理解。故选D
【点评】连词在中考中涉及到的很多,尤其在宾语从句、状语从句、定语从句中连词是必考点。平时学习过程中,掌握连词的意思,及所表示的关系是至关重要的,这种关系的判断可以通过句子意思的理解来选择恰到的连词。
13.B
【解析】句意:虽然他很年轻,但是他能做很多事情。在同一个句子中though, but不能共存,据句意,故选B。
【点评】考查though引导让步状语从句,thought与but不连用。
14.B
【解析】句意: 虽然我爷爷年纪大了,但他看起来非常强壮和健康。As 当……时,因为,尽管; Although 虽然,尽管;Until直到……为止。根据"...my grandfather is old, he looks very strong
and healthy."可知,前后两句构成转折对比关系,故空处表示"虽然"。故选B。
【点评】考查连词辨析。注意:句子上下文是判断连词正确性的重要依据。考生需要仔细阅读句子,理解句子之间的逻辑关系,从而推断出应该使用哪个连词。连词在不同句型中的用法可能会有所不同。考生需要掌握连词在简单句、并列句和复合句中的用法,以便在解题时能够准确判断句子的类型和连词的正确用法。
15.C
【解析】句意:人生就像爬山,虽然感觉很累,但你会欣赏山顶的美景。A自从,B但是,C尽管,you feel tired, you will enjoy the beauty at the top of the mountain是让步关系,故用Though引导让步状语从句,故选C。
【点评】考查让步状语从句,注意识记Though的用法。
16.A
17.A
【解析】句意:虽然这个男孩十岁了,但是他能讲五种语言。although,(虽然,即使)、but(但是)、so(所以)、and(并且)都是连词,在句中只能用一个连词,用although就不能再用其他连词,故选A。
【点评】考查连词,注意although和but不能连用。
18.C
【解析】句意: 不管这只小猫做了什么,它都不可能跳过那堵高墙。 A.无论何时;B.无论哪里;C.无论什么。根据the little cat has done, it could not jump over that high wall可知, 此处的意思是“不管小猫做了什么”。故选C。
【点评】考查让步状语从句,注意连接代词whatever的用法。
19.D
【解析】句意:我饿了,因此我吃了些食物。英语中because与so不能同时出现在同一句子中,首先排除A,B;因为前后句之间是承接关系,所以用so比用because更合适,根据句意,故答案选D。
【点评】本题考查连词because和so的词义和用法。
20.D
【解析】句意:我认为我的初中生活很愉快,尽管我有时在学习上会遇到一些困难。A如果,B当,C直到,D尽管,I think my junior high school life is enjoyable, ____ I sometimes have some trouble in study是让步关系,故用though引导让步状语从句,故选D。
【点评】考查连词,注意识记though的用法。
21.C
【解析】句意:尽管得了重感冒,格林先生还是去参加了会议。because因为;unless除非;though尽管。根据填空处前后的内容可知,此句是though引导的让步状语从句。意思是“尽管”。故选C。
【点评】考查连词辨析,注意though引导的让步状语从句的用法。
22.C
【解析】句意: 尽管很累,志愿者们仍继续工作。 A.如果;B.因为;C.尽管;D.因为,当。根据 The volunteers continued their work和they were very tired可知,此句是although引导的让步状语从句。故选C。
【点评】考查连词辨析,注意although引导的让步状语从句。
23.D
【解析】句意:尽管他喉咙痛,老师仍然讲的非常大声。A以便,B一.....就,C只要,D尽管,此处表示让步关系,故是连词even though,故选D。
【点评】考查连词辨析,注意识记even though的用法。
24.B
【解析】句意: 尽管比赛以失败告终,但每个人都感到高兴。 Because因为;Although尽管;If如果;When当……时。分析句子语境可知, "尽管比赛以失败告终"与"每个人都感到高兴"之间形成让步关系, 即尽管存在某个事实或情况,但结果却与预期相反或不同。 故选B。
【点评】考查从属连词辨析以及让步状语从句。注意:仔细阅读题干,分析句子结构,确定从属连词在句子中的作用。同时,考虑语境信息,理解句子想要表达的整体意思。 将每个选项代入句子中,对比它们之间的差异。注意连词所引导从句的内容、语气以及与主句的关系,找出与语境最匹配的连词。 从属连词通常引导从句,从句在语法上需要满足一定的规则,如时态一致、主谓一致等。利用这些语法规则可以帮助你排除错误的选项。
25.A
【解析】句意:无论你开车开得多么好,你都必须要小心驾驶。no matter how well无论多么好;even though即使;ever since自从。根据you must drive carefully和整个句子可知此处应是表达无论技术多好,都要小心,故选A。
【点评】考查连词辨析和让步状语从句。注意根据前后句子的句意选择正确的连词。
26.B
【解析】句意:无论他多忙,他总是准备好帮助别人。no matter how:无论多么,thanks to: 多亏,arrcording to:根据,even though:尽管,故选B。
【点评】考查让步状语从句。no matter和特殊疑问词连用引导让步状语从句。
27.D
【解析】句意:--凯特,你觉得你的新学校怎么样?--尽管它有点小,但是它非常的干净,美丽。if,如果,表示条件关系;since,自从……,表示时间关系;unless,如果不,引导条件状语从句;although,尽管,虽然,表示让步关系,结合句意,关系D。
【点评】考查连词辨析,注意常见连词的用法与区别。
28.B
【解析】句意:虽然我爷爷75岁了,但他很强壮,可以每天去慢跑。Because因为;Although虽然;When当……时;Since自从。分析"...my grandfather is 75, he is strong enough to go jogging every day."可知,前后两句构成让步关系,用Although引导让步状语从句,故选B。
【点评】考查从属连词辨析。注意: 连词连接两个分句或引导一个从句,两个分句或主从复合句之间通常用逗号连接。注意连词在句子中的位置,以及它引导的是哪种类型的从句,这有助于确定正确的连词。 理解句子的整体意思,以及每个选项连词的含义和用法,是确定正确答案的关键。例如,当句子表达的是时间关系时,应该选择时间状语从句的连词;当句子表达的是条件关系时,应该选择条件状语从句的连词。
29.A
【解析】句意:虽然他很累,他不得不再开两个小时的车。though引导让步状语从句,不可用but;keep doing sth一直做某事。故选A。
【点评】考查让步状语从句和动名词作宾语。
30.C
【解析】句意:全世界每年都有很多人想攀登珠穆朗玛峰,尽管它非常危险。if如果,引导的条件状语从句;while当……时,引导的时间状语从句;though尽管,引导的让步状语从句。根据前后句的句意,可知前后句是让步关系,故选C。
【点评】考查连词辨析。理解连词的词义和用法,根据前后句的关系,选择正确的连词。
31.C
【解析】句意:马克不来听音乐会,虽然他已经完成了他的工作。so所以,引导原因状语从句;when当……时候,引导时间状语从句;although尽管、虽然,引导让步状语从句;because因为,引导原因状语从句。所以选C。
【点评】考查状语从句的连词辨析。
32.B
【解析】句意:——每当我看到和爸爸在一起的照片,我就忍不住哭了。——是的。他们总是让你想起童年的美好回忆。However,无论怎样,whenever,无论何时,whatever,为了什么,空一,根据They always remind you the good memories in the childhood,可知表示时间,每当我看到和爸爸在一起的照片,引导让步状语从句,空二,can't help doing,固定搭配,忍不住做事,故选B。
【点评】考查引导让步状语从句,注意识记whenever,can't help doing的用法。
33.C
【解析】句意:虽然美国人和英国人说同样的语言,但他们的文化却截然不同。A.Since因为,因为;B.If如果;C.Although尽管,虽然。由前后句意可知,空处需用although引导让步状语从句。故选C。
【点评】考查连词辨析。注意although的用法。
34.B
【解析】句意: 在广场上跳舞在许多妇女中很受欢迎, 无论在什么季节。A.无论何时;B.无论什么;C.无论哪里;D.无论谁。根据空后the season可知,此处指无论什么季节,故选B。
【点评】考查连词辨析和让步状语从句。注意whatever引导让步状语从句的用法。
35.D
【解析】句意:虽然这个帽子看起来漂亮,但是我不会买它。它对于我来说太大了。"看起来漂亮"和"不会买"是转折关系,排除AB,although和but一般不同时使用,C错误,D正确,故选D。
【点评】考查连词的用法。注意识记although的用法。
36.C
【解析】句意:虽然雨下得很大,但农民们仍在地里干活。although,尽管,because,因为,根据雨下得很大,农民们仍在地里干活,可知是让步关系,故用although引导,although和but不同时使用,故选C。
【点评】考查连词辨析,注意识记although和but不同时使用的用法。
37.C
【解析】句意:——即使你教了我很多,我还是不能很好地读出这个单词。——别紧张。熟能生巧。A. but但是;B. whether是否;C. even though即使,尽管;D. as soon as一……就……。根据"I can't still pronounce the word well"以及"you teach me a lot",可知前后存在让步关系,即尽管教了很多,还是读不好,因此用 even though 引导让步状语从句。故答案为:C。
【点评】考查连词辨析。注意区分不同连词所引导的从句类型以及表达的逻辑关系,本题中要根据前后句的逻辑关系判断是让步关系,从而准确选择合适的连词。
38.D
【解析】While然而,当……时;Nor也不,也不是;But但是,然而;Although虽然,尽管。句意:尽管丽丽只有十三岁,但是她知道2000个英语单词。结合语境可知选D。
【点评】该题型是属于英语考试的基础题型,是必考内容。英语单词同汉语一样具有一词多义,一词多性的特点。解答此类问题首先要理解每个选项的基本含义,并注意交叉含义间的区别,了解其特殊用法,然后结合语境选择正确答案。
39.A
【解析】句意:不管你喜欢游泳还是划船,你都会在水上公园玩得很开心。whether...or...;if如果,引导条件状语从句;but但是,并列连词,表示转折;either...or...不是......就是......,或者......或者......;both...and...不仅......而且......。根据下文 you'll have fun in the water park. 可知不管哪种运动在水上公园都会玩的开心。由前后之间的关系,可知前句表示让步,要用whether...or...引导的让步状语从句。故选A。
【点评】考查连词辨析。理解前后句的意思,确定前后句的关系,选择正确的连词。
40.B
【解析】句意: 足球比赛再继续, 尽管昨天晚上雨下得很大。A. if如果;B. though尽管;C. so that为了, 表示目的;D. so因此。这里是though引导的让步状语从句。根据题意, 故答案为B。
【点评】考查引导状语从句的连词辨析,弄清前后句子的关系,根据逻辑判断选项。
41.D
【解析】句意:尽管林峰不得不工作很晚,她一直在她的脸上带着微笑。A. Because因为; B. If 如果; C. Until 直到; D. Though尽管。结合句意,工作到很晚和带着微笑,前后表示让步关系,故用连词though。
故选D。
【点评】考查连词的用法。
42.B
【解析】句意:虽然生活充满了起起落落,但是我们仍然应该以希望和勇气面对它。A.只要;B.尽管;C.一......就........;D.in order to do sth.目的是做某事,固定搭配,排除D。life is full of ups and downs生活充满了起起落落,we still should face it with hope and courage我们仍然应该以希望和勇气面对它,结合选项可知讲的是虽然生活充满了起起落落,但是我们仍然应该以希望和勇气面对它,故选B。
【点评】考查连词辨析,注意识记even though的用法。
43.C
【解析】句意:虽然刘翔没能参加2008年奥运会,但我们仍然为他感到骄傲。because因为,so因此,because和so只能单用,排除答案A,although虽然,but但是,although和but只能单用,排除答案D,联系前后两句,表示转折关系,引导让步状语从句,用although,故选C。
【点评】考查连词辨析。注意识记because,so,although,but词义和用法,掌握because和so只能单用,although和but只能单用,根据语境选择合适的答案。
44.B
【解析】句意:无论你对成都有多了解,你都很容易找到一些你从未吃过的美味佳肴。instead of而不是;no matter无论;even though即使。根据"how well you know about the city of Chengdu, it is easy for you to find something delicious that you have never eaten."可知是无论你对成都有多了解,你都很容易找到一些你从未吃过的美味佳肴。故选B。
【点评】考查连词辨析。注意:句子上下文是判断连词正确性的重要依据。考生需要仔细阅读句子,理解句子之间的逻辑关系,从而推断出应该使用哪个连词。连词在不同句型中的用法可能会有所不同。考生需要掌握连词在简单句、并列句和复合句中的用法,以便在解题时能够准确判断句子的类型和连词的正确用法。
45.A
【解析】句意:—Clara,你初中毕业以后,你最想念哪个老师?—李老师,她总是帮我找到答案,不管它们是多么的困难。no matter 无论,不管,后面加上疑问词引导让步状语从句,no matter how不管多么,故选A。
【点评】此题考查让步状语从句。
46.B
【解析】句意:尽管天气很冷,并且也很晚了,但是他们坚持在户外工作。A但是,B尽管,C因为,D所以,it was cold and late, they kept working outside是让步关系,所以用although引导让步状语从句。故选B。
【点评】考查连词,注意识记Although引导让步状语从句的用法。
47.B
【解析】句意:不管发生什么,我们都不会放弃我们的计划。A 无论如何;B 无论什么;C 无论什么时候;D 无论哪里。分析句子成分可知句子缺少主语成分,要用 whatever 充当,故选B。
【点评】考查连词辨析,注意识记“疑问词+ever”的用法。
48.A
【解析】句意:虽然那家超市的价格有点高,但我们还是喜欢去那里购物。Although虽然,尽管;As long as只要;Since自……以来;the prices are a little higher at that supermarket(那家超市的价格有点高)和we still like to go shopping there.(但我们还是喜欢去那里购物。)可知这里表示虽然价格有点高,although,表示让步,符合题意,故答案为A。
【点评】考查although/though引导让步状语从句。理解句意并掌握although的意义和用法。
49.A
【解析】句意:虽然他们感到很累,但他们仍然继续工作。A./不填;B.and和,表示并列、顺承关系;C.but但是,表示转折关系;D.so因此,表示因果关系,引出结果。根据句意"虽然他们感到很累,但他们仍然继续工作。" 在这里两个句子之间存在一个相反的让步关系,though/although"虽然;尽管",引导让步状语从句,注意句子中用了though/although之后,不能再使用but表转折;故答案选A。
【点评】考查连词辨析,首先识记连词词义,然后根据前后句句意确定连词。
50.D
【解析】句意:尽管这意味着人们可以旅行得更远更快,但运输大量货物仍然是一项困难的工作。A:and humans continued walking across the globe"并且人类继续徒步穿越全球";B:so these old paths quickly became extremely difficult to use"因此这些旧路很快变得极难使用";C:but the inventor probably first used them to transport things"但是发明者可能最初用它们来运输物品";D:transporting large amounts of goods was still a difficult job"运输大量货物仍然是一项困难的工作"。空前Although表让步,意为"尽管……但是……",该选项"仍然困难"与前文"能走得更远更快"形成合理的让步转折——尽管有"走得远、快"的优势,但"运输大量货物"的问题仍未解决,逻辑通顺且语法正确。故选D。
【点评】本题将语法规则与语义逻辑结合考查,既能检验学生对 although 用法的掌握程度,又能引导学生理解 "让步关系" 的本质 —— 承认前半句的事实,后半句提出与之形成对比的情况。
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