---Could I have a word with you, mum? ----Oh, dear, if you ______.
#63584
A
can
B
must
C
may
D
should
推荐题目
–Must I finish my homework tonight?-No, you______.
#75994
A
Can’t
B
Mustn’t
C
needn’t
D
may not
—_______ do you clean your room?— Every day. 
#77537
A
How long
B
How many
C
How often
D
How soon