问题
填空题
用how to, what to, where to, which to, when to填空。
1. I don't know __________ have for lunch.
2. Everybody knows __________ use a computer.
3. Can you tell me ___________ put the coats?
4. You need to decide __________ choose, the black one or the red one?
5. You should know __________ keep quiet.
答案
1. what to 2. how to 3. where to 4. which to 5. when to