7.2-2a=23.6是方程．______．（判断对错）

用所给词的正确形式填空。

1. We are going to have great fun             (sing) this song.

2. Would you like something             (eat)?

3. There             (be) a desk and three chairs.

4. Listen! Who             (cry)?

5.            (not come) late again. Tom.

6. Nothing             (happen) yesterday.

7. Who             (not be) here yesterday?

8. It takes me 20 minutes             (wash) my shoes.

9. He keeps a diary             (remember) things.

10.             (do) eye-exercises is good for your eyes.