She looks very sad. I want to help her, but I just don’t know ____ to do it.
You’d better ________here _________ the heavy rain
---Must I finish my homework now ? ---No, you ________
Tom was so tired that he fell _________on the bed and went to sleep
How long can you __________ the book from the library?
— What about a drink of tea? —Hurry up. There is time for a drink.