第一部分 听对话回答问题
本部分共有10道小题，每小题你将听到一段对话，每段对话听两遍。在听每段对话前，你将有5秒钟的时间阅读题目；听完后，你还有5秒钟的时间选择你认为最合适的备选答案。在听到“嘀”的信号后，进入下一小题。
() 1. What ecosystem are they talking about?
B.
() 2. What animal is mentioned in the dialogue?
B.
() 3. What are the two speakers looking at?
B.
() 4. What is the man going to do to protect the ocean?
B.
() 5. Which detail is NOT discussed about the hares?
A. Their favorite food.
B. Their color change in winter.
C. The purpose (目的) of hiding in snow.
() 6. What are the speakers mainly talking about?
A. What an ocean ecosystem includes.
B. How to protect whales in the ocean ecosystem.
C. The best places to see coral reefs.
() 7. What animals DON’T live on the polar ice?
A. Polar bears.
B. Seals.
C. Penguins.
() 8. What’s the girl’s opinion about the changes?
A. She thinks the changes are all good.
B. She thinks the changes have caused certain problems for wildlife.
C. She thinks the changes make room for animals and plants.
() 9. Which human action is NOT included in the conversation?
A. Factory pollution.
B. Damaged rivers and lakes.
C. Harmful plastic bags.
() 10. What can we infer about desert animals?
A. They have special ways to store water.
B. They never need water.
C. They only come out at night.

1.C 2.B 3.C 4.C 5.A 6.A 7.B 8.B 9.C 10.A