问题

If you _____ smoke, please go outside because this is a non-smoking office. [ ]

A: must
B: should
C: can
D: may

正确答案是：

同类题型

I regret _________ you that youcan’t ________ the game

What he said that day was deeply impressed _______ my memory

I’m in Class 4. Are you in Class 4, ____—Yes, I am.

Could I play computer games for a while, Mum? I’ve finished all my homework. —Oh, dear, if you _____.

下列句式与其他三项不同的一项是（）