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Unit 4 The Wonders of Nature
单元综合练习（限时40分钟）
一、单项选择
1. The Caspian Sea is ______ salt lake in the world.
A. big B. bigger C. biggest D. the biggest
2. This path is not ______ that one. It is much narrower.
A. as wider as B. so wide as C. wider than D. as wide than
3. — How deep is the Mariana Trench
— It is about 11,000 metres ______.
A. deep B. depth C. deeply D. in deep
4. Among the three mountains, Qomolangma is the ______.
A. high B. higher C. highest D. most high
5. The Nile is one of ______ rivers in Africa.
A. long B. longer C. longest D. the longest
二、完形填空
阅读下面短文，从每小题所给的A、B、C、D四个选项中选出最佳选项。
Have you ever visited a desert The Sahara is the (1) ______ hot desert in the world. It covers about 9.2 million square (2) ______. That is much (3) ______ than the whole United States! The Sahara is not (4) ______ the Gobi Desert in Asia. The Gobi is much smaller and (5) ______. In the Sahara, the temperature can be over 50°C during the day. At night, it gets much (6) ______. Sometimes it even drops below 0°C. That is (7) ______ amazing fact about the desert. Last year, a scientist (8) ______ three months researching the plants there. He said, “The Sahara is one of the (9) ______ places on Earth, but it is also very beautiful.” If you want to challenge (10) ______, why not learn more about such a wonder
1. A. large B. larger C. largest D. the largest
2. A. kilometre B. kilometres C. square kilometre D. square kilometres
3. A. big B. bigger C. biggest D. the biggest
4. A. as large as B. larger than C. so large that D. the largest
5. A. cold B. colder C. coldest D. the coldest
6. A. cold B. colder C. coldest D. the coldest
7. A. the most B. more C. an D. a
8. A. spend B. spent C. take D. took
9. A. hot B. hotter C. hottest D. most hot
10. A. you B. your C. yours D. yourself
三、词汇运用
用括号中所给单词的适当形式填空。
1. The swimming pool is about 50 ______ (metre) long.
2. This road is as ______ (wide) as the main street, about 12 metres.
3. The weather today is much ______ (bad) than yesterday. Let’s stay at home.
4. Among all the students, Lily answered the questions ______ (quickly).
5. The Yellow River is one of the ______ (long) rivers in China.
6. Could you speak a bit ______ (slowly) I can’t follow you.
7. The ______ (deep) of the lake is hard to believe — over 1,600 metres.
8. This forest covers an area of 500 ______ (square) kilometres.
9. That was the ______ (amazing) view I have ever seen in my life.
10. Tom jumped ______ (far) than any other boy in the long jump competition.
四、句型转换
按要求完成句子（每空一词）。
1. This building is not as tall as that one. （改为同义句）
That building is ______ ______ this one.
2. The river is about 3,200 kilometres long. （对画线部分提问）
______ ______ is the river
3. Lake Superior covers about 82,000 square kilometres. （对画线部分提问）
______ ______ is Lake Superior
4. Mary is the most careful student in her class. （改为同义句）
Mary is more careful than ______ ______ student in her class.
5. This card is 10 cm long and 6 cm wide. （改为意思相近的句子）
This card is 60 ______ ______.
五、语法填空
阅读下面短文，在空白处填入一个适当的单词或括号内单词的正确形式。
Do you know the Great Barrier Reef It is the (1) ______ (large) coral reef system on Earth. It is much (2) ______ (big) than the Great Wall of China in area. The reef is famous (3) ______ its amazing sea life. Thousands of species live there. However, the water level (4) ______ (be) rising slowly because of climate change. (5) ______ reason is pollution from nearby cities. If the water temperature gets (6) ______ (high), the corals will die. Scientists have spent many (7) ______ (year) studying the reef. They say it is (8) ______ (real) important to protect it. The (9) ______ (deep) of the reef area can reach over 100 metres. Everyone should do (10) ______ (they) best to save this natural wonder before it is too late.
答案
一、单项选择
1-5: D B A C D
二、完形填空
1-5: C D B A B
6-10: B C B C D
三、词汇运用
1-5: metres wide worse most quickly longest
6-10: more slowly depth square most amazing farther
四、句型转换
1-5: taller than; How long; How large / How big; any other; square centimetres
五、语法填空
1-5: largest bigger for is Another
6-10: higher years really depth their

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