题目内容：

用方框中所给单词的适当形式填空，每个单词限用一次。

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1.The boy is selfish. He never ________ his things with others.

2.Can you make __________ for the lady？

3.The more we know the world, the more _________we will be.

4.Do you think this kind of water is safe for­­­_________?

5.The old man invited all his friends to his __________ birthday party last Sunday.