---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
We can hardly believe such a young boy ______ travel around the world all by himself.
#62532
A
may
B
need
C
should
D
must
—I can’t stop smoking, doctor.— For your health, I’m afraid you________.
#77297
A
must
B
have to
C
will
D
can