题目内容：

根据句意和中文注释，写出单词的正确形式。

1.Aunt Liu ______________（唤醒）her son up at 6 o’clock every morning.

2.We read a lot of Chinese _____________（英雄）stories before the 70th Anniversary of the End of  the War of Resistance against Japanese Aggression（抗日战争胜利70周年）.

3.You’re late again. Can you tell me the ____________（原因）?

4.Mrs.Zhang is a good teacher. She teaches _____________（我们）Chinese this term（学期）.