所给单词的正确形式填空。

1. My mother is a bus _____ (drive).

2. — How many _____ (tomato) can you see?

    — I can see four.

3. Mr. White goes _____ (shop) every morning.

4. What are you going to _____ (be) when you grow up?

5. Betty often _____ (wash) her dress on Sunday.