1. 句型转换。

1. （1） Will there be more pollution in the future? (作肯定回答)

   Yes, .

3. （2） There is a girl in the room. She is dancing.(合并为一句 )

   There a girl in the room.

5. （3） It's impossible for me to work out that difficult problem.(改为同义句)

   It for me to work out that difficult problem.

7. （4） Tom spent two hours finishing his homework.(改为同义句)

   It Tom two hours his homework.