1. (2016·常州) 用括号内所给动词的正确形式填空

1. （1） I didn't know how（teach）children when I started to work in a primary school.
3. （2） –Why didn't you come to open the door for me?

   —I （wash）dishes in the kitchen and didn't hear the doorbell.

5. （3） My computer fan doesn't work. Where can I have it （repair）?
7. （4） I don' t think he stole the painting. When he （ask）what he was doing at 7 yesterday evening, he was very calm.
9. （5） –Is there any mistake in your homework, Jim?

   —I'm not sure. I （not check）it carefully.