1. (2019·瓯海模拟) 用方框中所给单词的适当形式填空。每词限用一次。

five    warn     abroad   humorous   century

1. （1） Chen Lei kept writing to his parents while he was working .
3. （2） I enjoy Mr. Johnson's class, because he is  teacher in my mind.
5. （3） It is difficult people about an earthquake before it happens.
7. （4） You can see objects and paintings of differentin the Louvre Museum.
9. （5） Next week is my sister Sally's birthday, we plan to have a big party for her.