单词拼写题。

1. You must not leave school without ________(允许).

2. It was several days before the floodwater sank and life returned to _________(正常).

3. That famous university is very famous for its strict _________(纪律).

4. I saw the ________ (罪犯)taken away by two policeman.

5. The _________(平均的) age of the boys in this class is fifteen.