1. It’s the library. So you ________ know shouting is not allowed here.
A. can B. must C. need D. may
2. —________ our English teacher be in her office now?
—No,she ________ be in her office now. She has gone home.
A. Can;can’t B. May;may not
C. Must;mustn’t D. Can;mustn’t
3. —Dean,I hear you’ve got a set of Canadian stamps. ________ I have a look?
—Of course . I’ll fetch them for you.
A. May B. Must C. Should D. Need
