1. 用括号内所给词的适当形式填空。

1. （1） The girl is going to repair the bike by  (she).

3. （2） —Peter and Tom have  (cold).
   

   —They should go to see a doctor quickly.
   

5. （3） Helen fell off her bike and  (hurt) her knees.

7. （4） Frank ran fast and  (fall) down.

9. （5） —What is Frank doing?
   

   —He is  (lie) on the sofa watching TV.