问题

You ________ be too careful when crossing the busy street. [ ]
A: can
B: cannot
C: must
D: mustn’t
B: cannot
C: must
D: mustn’t
正确答案是:
同类题型
We live in an age _____ more information is available with greater ease than ever before [ ]
You’d better write down the phone number ofthat restaurant for future .
The meeting __ tomorrow will be of greatimportance. All of us should attend it.
News came from the school office ________Wang Lin had been admitted to Beijing University.