题目内容
14. environmental protection
14. 环境保护
2. get worse and worse
3. The boy ran out of the house and (appear) in the dark quickly.
14. turn...into
2. 在中国南部
9. cut off
5. The car is so expensive that I can't (买得起) it.
2. 这条河过去是如此的干净，但是现在河底满是垃圾。
The river so clean,but now the bottom of it rubbish.
( ) 4. is helpful to our environment.
A. Cutting down trees B. Killing animals
C. Stopping riding in cars D. Recycle paper
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