1. 用方框中所给单词的适当形式填空。

lost   around   knock   answer   hungry

1. （1） —Mum, I'm. Can I eat some bread?

   —Yes. It is in the fridge.

3. （2） It is polite to on the door before you come into a room.
5. （3） The girl looked, but she didn't find her mother.
7. （4） It's easy to be in the big supermarket.
9. （5） Just now no one this question.