根据所给的词，写出正确的单词形式。

1. _________ (one) of all you must close the door.

2. Everybody is _________ (suppose) to know the dancer.

3. You must take care of yourself and keep _________ (health).

4. She is a _________ (luck) girl.

5. The boy is _________ (bad) than yesterday.

6. He _________ (choose) a toy just now.

7. We are _________ (Asia).

8. The _________ (speak) are Tom and Linda.

9. These are our _________ (report card).

10. She _________ (copy) my homework every day.

（）提醒我们教师在转化“差生”过程中要多些真诚，同时用足够的耐心鼓励他，就可能会收到意想不到的效果。

A.鲶鱼效应

B.蝴蝶效应

C.南风效应

D.木桶效应