1. 根据句末要求完成句型。

1. （1） None of us likes pollution. (同义句替换)

   pollution?

3. （2） A lot of water can be saved by forest .(改为主动语态)

   Forest a lot of water.

5. （3） The old man couldn't see anything. (同义句替换)
   

   The old man could .

7. （4） You mustn't walk on grass or pick flowers. (改为祈使句)
   

   on grass or pick flowers.

9. （5） The government is doing something useful to protect the environment.(就划

   线部分提问)

   is the government to protect the environment?