() 5. Who takes care of the plants in the classroom?
A.The cleaner.
B.The teacher.
C.The students.

() 6. Why do deep-sea fish glow?
A.To scare sharks.
B.To find food or friends.
C.To clean the water.

() 7. How do eagles fly long distances?
A.By flapping wings fast.
B.By sleeping while flying.
C.By using warm air.

() 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.

() 9. When is World Wetlands Day?
A.On 2nd January.
B.On 2nd February.
C.On 20th February.

()10. How large is the nature reserve?
A.3,140 square kilometres.
B.3,410 square kilometres.
C.3,014 square kilometres.

( )11. What do people think the Yellow River is?

( )12. How long is the Yellow River?