(
A.The cleaner.
B.The teacher.
C.The students.
C
) 5. Who takes care of the plants in the classroom?A.The cleaner.
B.The teacher.
C.The students.
答案：C
(
A.To scare sharks.
B.To find food or friends.
C.To clean the water.
B
) 6. Why do deep-sea fish glow?A.To scare sharks.
B.To find food or friends.
C.To clean the water.
答案：B
(
A.By flapping wings fast.
B.By sleeping while flying.
C.By using warm air.
C
) 7. How do eagles fly long distances?A.By flapping wings fast.
B.By sleeping while flying.
C.By using warm air.
答案：C
(
A.The changes are all good.
B.The changes make room for animals and plants.
C.The changes have caused some problems.
C
) 8. What’s the girl’s opinion about the changes?A.The changes are all good.
B.The changes make room for animals and plants.
C.The changes have caused some problems.
答案：C
(
A.On 2nd January.
B.On 2nd February.
C.On 20th February.
B
) 9. When is World Wetlands Day?A.On 2nd January.
B.On 2nd February.
C.On 20th February.
答案：B
(
A.3,140 square kilometres.
B.3,410 square kilometres.
C.3,014 square kilometres.
B
)10. How large is the nature reserve?A.3,140 square kilometres.
B.3,410 square kilometres.
C.3,014 square kilometres.
答案：B
( )11. What do people think the Yellow River is?
( )12. How long is the Yellow River?
A
( )12. How long is the Yellow River?
C
答案：A C