题目内容

用括号中所给的动词的适当形式填空。

1. You must _____ (look) after your pet dog. Don't let it run here and there.
2. —What's behind the door?
    —There _____ (be) two balls.
3. —Why not _____ (sing) an English song together?
    — Good idea.
4. There _____ (be) some money in that purse.
5. We are planning _____ (go) for a picnic this Sunday.
6. It often _____ (rain) here in summer.
7. You must remember _____ (close) the window when school is over.
8. The students are busy _____ (do) their homework.
9. _____ (skate) is my favorite sport.
10. There _____ (be)a pen and some books on the desk.

1. look 2. are 3. sing 4. is 5. to go 6. rains 7. to close 8. doing 9. Skating 10. is
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