It rained heavily, so we _______ stay at home watching TV or surfing the Internet all day.
A. could B. had to C. must
---Would you come to my birthday party tomorrow evening?
---I’m afraid I ______. I have to look after my sister.
A. wouldn’t B. can’t C. won’t D. mustn’t
—Can I borrow your dictionary?
—Yes, you _______.
A. Can B. must C. should
— _ I use your eraser, Rose?
— Sure. Here you are.
A. May B. Would C. Need D. Must
— Must I return the book this week?
— No, you ____. You can _ it for 20 days.
A. mustn't: keep B. needn't; borrow C. needn't; keep D. mustn't; borrow
—Do you know the song Come on, Haixi!—Yes, and I _________sing it well.
A. must B. can C. need
