1. In class, you should listen to your teacher's ............... attentively. (explain)
2. Everything in the shop is ............... cheap. (surprise)
3. It is very ............... when you have a toothache! (please)
4. In electronics, they learn how to repair ............... appliances. (house)
5. You should have a balanced diet because .............. is very important for you to have good health. (moderate)
