题目内容：

根据句意，用所给单词的适当形式填空。

1.He doesn't know the ______(important) of life.

2.When Miss Li heard the bad news, she cried            (sad).

3.Every year there are many           (tour) visiting the Great Wall.

4.Some           (hunt) kill bears for their paws.

5.Peter came to China in 1998, he became         (interest) in Chinese history.