Module 12 Help
Ⅰ. 单项选择
1. - May I go out now, Dad?
- No. You ________ let your mother know first.
A. can B. may C. need D. must
2. The work is too hard for him. He ________ finish it on time.
A. can’t B. mustn’t C. shouldn’t D. needn’t
3. - Fifty dollars for such a T-shirt! You ________ be joking!
- I’m serious. It’s made of silk.
A. must B. need C. may D. can