---I think Helen is at home.---No, she    be at home, for she phoned me from the airport just five minutes ago.
#63132
A
mustn't
B
needn't
C
can't
D
dared not
推荐题目
You ________ in person; a telephone would have been enough.
#62344
A
couldn't have come
B
needn't have come
C
shouldn't have come
D
mustn't have come
Everybody there was _______ by the _______ story.
#75049
A
moving; moving
B
moving; moved
C
moved; moved
D
moved; moving