1. The students _____ (打招呼) their teachers every time they meet their teachers.
2. The government took effective measures to _______ (保证) the basic life of the earthquake stricken victims.
3. Nobody can touch the devices without the teacher’s _________ (允许).
4. He took no notice of the __________ (禁令)of begging in the street.
5. He was so excited that he stayed awake _____________ (自始至终) the night.
