-Mayweleavetheclassroomnow?
-No,you______.You______toleaveuntilthebellrings.
A.mustn’t,areallowed
B.don’thaveto,aresupposed
C.needn’t,aren’tallowed
D.can’t,aren’tsupposed
第1题:
A. mustn’ t
B. needn’ t
C. can’ t
D. may not
第2题:
There must be something wrong with my computer,()there?
A. mustn't
B. needn't
C. isn't
第3题:
A. mustn’ t…must
B. needn’ t…must
C. can’ t…can
D. can’ t…must