问题:
The task is so hard that he_______ finish it on time.
[ ]
A.shouldn"t
B.needn"t
C.can"t
D.mustn"t
The task is so hard that he_______ finish it on time.
B.needn"t
C.can"t
D.mustn"t
[ ]
A.shouldn"t B.needn"t
C.can"t
D.mustn"t
参考答案: