一）单项选择：
1． You _________show your ticket unless the conductor asks for it.
A. can’t B. needn’t C. shouldn’t D. mustn’t
2． Let’s go and have a look at the posters there, _________?
A. will you B. shall you C. will we D. shall we
3． Let me have a look at the photos you took, __________?
A. will you B. shall you C. will we D. shall we
4． That boy ________ be a native English speaker, he speaks English with a strong Indian accent.
A. can’t B. needn’t C. shouldn’t D. mustn’t
5． The new stadium _________ hold more than 10,000 people.
A. is able to B. can C. could D. was able to
6． --Must I finish all the work before Sunday?
--No, you ______.
A. can’t B. needn’t C. don’t D. mustn’t
7． How _______ be so mean to me?