1. 句型转换。

1. （1） It is not possible to clean up the river in two days.（改为同义句） to clean up the river in two days.

3. （2） It is full of hope for the team to win the match.

   It for the team to win the match.

5. （3） This dictionary cost me 50 yuan.（就画线部分提问）

   this dictionary cost you?

7. （4） Why didn't he pass the exam? I want to know.（改为复合句）

   I want to know he the exam.

9. （5） Li Lei runs faster than Wu Yun.（改为同义句）

   Wu Yun doesn't run so Li Lei.