— Could I have a word with you mum?— Oh dear if you . A. canB. mustC. mayD. should

问题补充：

— Could I have a word with you, mum?

— Oh dear, if you .

A. can

B. must

C. may

D. should

答案：

A. can

(答案→)B. must

C. may

D. should

解析：must在此表示坚持或固执，if you must的意思是“如果你一定要说的话，你就说吧”。