单项选择题

——Must I hand in the exercise-book this morning
——No, you

A. needn' t
B. musn' t
C. don' t
D. can' t
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单项选择题
I don' t know whether he ______.
A. dares try
B. dare try
C. fear try
D. fears try
单项选择题
If he had worked harder, he ______.
A. would succeed
B. should Succeed
C. would have succeeded
D. had succeeded
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