题目内容：

用所给词的适当形式填空。(5分)

1.Tom told them     (polite)to leave him in peace.

2.Which language _______the most widely_______（speak）in the world？

3.We should practice__________(read) aloud in class.

4.She is _______(pride) of me for not giving up easily.

5.She could fall________(sleep) last night.