听一段对话，回答第11~12小题。
（）11. Why has the lake become dirty?
A. Because there was no one to protect it.
B. Because there were too many dead fish.
C. Because the visitors threw rubbish into the lake.
（）12. What did Jack take to the leader of the park?
A. Some news.
B. A bottle of water and some dead fish.
C. A report.

[思维品质]听第一篇短文，回答第13～15小题。
Saving our earth
Reason People cut down trees, throw rubbish away and 13.
Result Land has changed into desert.

14 are dead.
The temperature is rising and people are unhealthy.
Suggestion Recycling, not buying single-use things and 15.
() 13. A. turn the wetlands into farmland B. have millions of tons of plastic waste C. pour wastewater into rivers and lakes
() 14. A. Fish B. Rivers and lakes C. Animals and plants
() 15. A. having a green life B. saving money C. protecting the air

听第二篇短文,回答第16~20小题。
() 16. What do many places in the world need today?
A. More sea water. B. More clean water. C. More fresh water.
() 17. How many ways does this passage tell us to get fresh water from the sea water?
A. One way. B. Two ways. C. Three ways.
() 18. Which way costs more money, but works faster than the sun?
A. The way of heating the sea water. B. The way of making the sea water cold.
C. Neither of the above.
() 19. What does the passage mainly talk about?
A. What many places in the world need.
B. Why to turn salt water into fresh water.
C. How to turn salt water into fresh water.
() 20. Which way is the best to get more fresh water?
A. Heating the sea water. B. Cooling the sea water below zero.
C. The way that costs the least money and produces the most fresh water.