Helen ______ go on the trip with us, but she isn’t quite sure yet. 
#90564
A
shall
B
must
C
may
D
can
推荐题目
We _____ for her because she never came.
#90213
A
mustn’t have waited
B
shouldn’t have waited
C
mustn’t wait
D
needn’t wait
We ________ jump to conclusions before we have all the facts.
#86585
A
couldn't
B
mightn't
C
shouldn't
D
mustn't
I would rather they ________ tomorrow.
#86545
A
came
B
come
C
will come
D
shall come