Just be patient .You ______ expect the world to change so soon .

A. can’t      B. needn’t     C. may not    D. whether

I’m afraid Mr. Harding ______see you now. He’s busy.

A. can’t           B. mustn’t           C. shouldn’t        D .needn’t

You ________ pay too much attention to your reading skill, as it is so important.

A. can’t          B. should           C. must             D. needn’t

It is required that the students ______ mobile phones in our school, so seldom ______ them using one.

A. can’t use; will you see             B. not use; will you see   

C. mustn’t use; will you see          D. shouldn’t use; you will see

— There were already five people in the car but they managed to take me as well .

— It ____ a comfortable journey .

A . can''t be B . shouldn''t be C . mustn''t have been D . couldn''t have been