题目内容：

词形填空  (根据句子的要求,用括号中所给词的正确形式填空。

1.We would brush our __________ (tooth) every day.

2.Mr. Zhang teaches __________ (we) Chinese this term.

3.Sally got many gifts on her __________ (twelve) birthday.

4.Selina was __________ (happy) to hear the sad news.

5.Chenglong is one of the most famous __________ (act) in China.

6.This physics problem is much __________ (difficult) than that one.

7.They often go hiking on __________ (sun) days.

8.Would you please keep the door __________ (open)? It’s very hot here.

9.Everyone should be __________ (care) when he walks across the busy street.

10.Mrs Brown walked __________ (quiet) out of her room in order not to wake up the children.