Ⅰ. 补全对话
根据对话内容，从方框内的选项中选出能填入空白处的最佳选项，其中有两个为多余选项。
A: Hi, Sarah. What's the biggest rainforest in the world?
B: 1.
A: How big is it?
B: 2.
A: Where is it?
B: 3. It crosses eight countries and most part of it is in Brazil.
A: Oh, you know so much about it.
B: Well, my teacher told me last week.
A: Could you tell me anything more about it?
B: Of course. 4.
A: It must be very special and beautiful.
B: Yes, it is. 5.
A: Why?
B: Because people cut down lots of trees every year.
A. How did you know it?
B. It is in South America.
C. It is the Amazon rainforest.
D. Thank you for telling me so much.
E. It is about 7 million square kilometers.
F. About 20% of the birds in the world live in it.
G. But it is becoming smaller and smaller in size these years.

1. C 2. E 3. B 4. F 5. G

Ⅱ. 完形填空
[人与自然·宇宙探秘]Do you know Venus (金星)? Why do people call it the Earth's “sister 6 ”? Well, Venus is close to the Earth. It's the second planet from the sun, while the Earth is the third from the sun. And Venus and the Earth are 7 the same size.
Scientists started to 8 Venus a long time ago. They looked at Venus through telescopes (望远镜). But Venus is 9 with thick clouds. The scientists couldn't see Venus through the clouds. For a long time, they thought that Venus had water and plants probably. They thought there might be 10, too.
Then in 1978, scientists started 11 space probes (探测器) to Venus. The probes flew through the thick clouds. They took pictures of Venus and things they found there back to the scientists.
The scientists learnt that they made a 12 in the past. Venus is much, much too hot. 13 could ever live on it. Scientists knew it was 14 for humans to go to Venus, so they made new probes. These new probes took great pictures of the planet. The pictures showed that Venus had plains (平原) and mountains. 15 it's hot, Venus looks like the Earth in some ways.
()6. A. space
B. planet
C. rocket
D. astronaut
()7. A. maybe
B. ever
C. just
D. almost
()8. A. look for
B. think about
C. learn about
D. hear from
()9. A. filled
B. covered
C. careful
D. busy
()10. A. animals
B. mountains
C. seas
D. trees
()11. A. adding
B. showing
C. taking
D. sending
()12. A. living
B. difference
C. mistake
D. wish
()13. A. Everything
B. Anything
C. Something
D. Nothing
()14. A. dangerous
B. possible
C. normal
D. useful
()15. A. So
B. Though
C. If
D. Because

6. B 7. D 8. C 9. B 10. A 11. D 12. C 13. D 14. A 15. B