. Mary _____ be in London because I saw her in town just now.
#88099
A
mustn’t
B
isn’t able to
C
needn’t
D
can’t
推荐题目
They demanded that the books________ to the school library at once. 
#86780
A
return
B
should return
C
be returned
D
would be returned
Often, when he ______ something that ______ him, he wasted his time drawing some little pictures. 
#89280
A
should be doing; gave
B
should have been doing; was given
C
should do; was given
D
should have been doing; had given
You did not go to the party yesterday, or I ___ you.
#89042
A
would see
B
could meet
C
might have seen
D
might see