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Unit 4 The Wonders of Nature
（1a-2d）校本练习
一、单项选择
1. The cave is so dark that we can see nothing ______ the surface.
A. below B. on C. above D. over
2. The ______ of the Grand Canyon makes every visitor feel small.
A. deep B. deepen C. depth D. deeply
3. It is ______ to find ice in the Sahara Desert during the day.
A. usual B. unusual C. as usual D. usually
4. The scientist ______ the forest for three years before he wrote the report.
A. researches B. researched C. will research D. is researching
5. Among all the hills here, this one is the ______, only 50 metres high.
A. low B. lower C. lowest D. most low
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 thought about the secrets of the ocean The (1) ______ of the sea is not the same everywhere. In some places, the water (2) ______ can be over 10,000 metres. When you look at the calm (3) ______ of the water, you can hardly imagine what lies (4) ______ it. Many scientists have (5) ______ the strange animals living at the (6) ______ of the deep sea. These creatures have special (7) ______ to live without sunlight. Last month, a team of researchers (8) ______ into the Mariana Trench to collect samples. They found that the water (9) ______ there is rising slowly. It is (10) ______ for such a deep place to be affected by temperature change. We need to learn more about these wonders before it is too late.
1. A. long B. depth C. wide D. high
2. A. level B. bottom C. surface D. top
3. A. ground B. floor C. rock D. surface
4. A. below B. on C. above D. over
5. A. researched B. watched C. noticed D. looked
6. A. top B. side C. bottom D. middle
7. A. ability B. abilities C. able D. disable
8. A. dive B. dives C. diving D. dived
9. A. level B. levels C. depth D. deep
10. A. usual B. unusual C. usually D. as usual
三、词汇运用
A) 根据句意及首字母或音标提示填写单词，使句子完整正确。
1. The submarine went d______ the sea ice to explore the unknown area.
2. Please wipe the s______ of the desk before you start writing.
3. The water l______ in the river has dropped a lot because of the dry weather.
4. She ______ /r s t t/ the living habits of tigers for her school project.
5. They found an old ship at the b______ of the lake.
B) 用括号中所给单词的适当形式填空。
6. The ______ (deep) of the well is about 30 metres.
7. It is ______ (usual) to see butterflies in winter here.
8. This is the ______ (low) point of the whole path.
9. Different people have different ______ (ability) to solve problems.
10. The boy ______ (dive) into the pool to get the toy yesterday.
四、根据汉语提示完成句子
1. 在地球上，没有比生命更珍贵的礼物。
______, there is no gift more precious than life.
2. 黄石公园有许多自然奇观，比如温泉和间歇泉。
Yellowstone Park has many ______, such as hot springs and geysers.
3. 我们需要学会如何与自然建立联系。
We need to learn how to ______ nature.
4. 那条河的底部有许多五颜六色的石头。
The ______ of the river is full of colourful stones.
5. 这个峡谷的深度让所有游客惊叹不已。
The ______ of this canyon surprises all the visitors.
五、补全对话
根据对话内容，从方框中选出适当的句子完成对话（有一项多余）。
A: Hi, Lucy! Have you ever visited any natural wonders
B: Yes, I went to the Dead Sea last summer.
A: Really 1.______
B: It is the saltiest lake in the world. People can float on the water easily.
A: 2.______
B: It is about 430 metres below sea level, the lowest point on Earth.
A: Wow! Where exactly is it
B: 3.______ It is a famous natural wonder.
A: What else did you learn about it
B: 4.______ Sadly, its water level is dropping year by year.
A: That’s worrying. 5.______
B: I agree. We should save water and protect such places.
选项：
A. It is becoming smaller and smaller.
B. What makes it so special
C. It lies between Jordan and Israel.
D. Why do people like to visit it
E. How low is it below sea level
F. We must do something to protect nature.
G. It is the highest mountain in the area.
答案
一、单项选择
1-5: B C B B C
二、完形填空
1-5: B A D A A
6-10: C B D A B
三、词汇运用
1-5: below; surface; level; researched; bottom
6-10: depth; unusual; lowest; abilities; dived
四、完成句子
1. On earth
2. natural wonders
3. connect with
4. bottom of
5. depth
五、补全对话
1-5: B E C A F

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