1. 用所给单词的适当形式填空

1. （1） It's rude to eat or drink while (walk) down the street.

3. （2） I find it difficult (remember) all the new words, but I won't give up.

5. （3） He used to (get) up early but now he doesn't.

7. （4） Isn't it strange that the cat is used to (lie) beside the dog peacefully?

9. （5） People in Japan and people in America behave (different) at the dinner table.

11. （6） I was a bit nervous before I arrived here, but there was no reason (be)．

13. （7） I'm very comfortable (speak) English now.