—Look! Is that Mr. Green?—It          be Mr. Green. He has gone to Shanghai.
#75596
A
must
B
can
C
mustn’t
D
can’t
推荐题目
-______ I do the laundry first?-No,you _____. You can do your homework first.
#76288
A
Must;mustn’t
B
Can;mustn’t
C
Must;needn’t
D
May;needn’t
---May we leave the classroom now?---No, you      . You       to leave until the bell rings.
#75743
A
mustn’t, are allowed
B
don’t have to, are supposed
C
needn’t, aren’t allowed
D
can’t, aren’t supposed