I"m sure he will ________ pass the exam. [ ]A. can B.

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I"m sure he will ________ pass the exam.    [     ]
A. can
B. could
C. is able to
D. be able to

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举一反三

Taking a boat to school _____ a lot more fun than taking a bus.[ ]
A. must have
B. must be have
C. must be

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Both of his parents died of illness so he support his family at the age of 14. [ ]
A. must
B. should
C. could
D. had to

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You _____ right.[     ]
A. may be
B. maybe
C. can be

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— Where"s Lucy, please?
— She _____ be in the library.[     ]
A. can
B. need
C. could
D. may

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Henry ________ be at home because he phoned me from the farm just now.[     ]
A. mustn"t
B. might not
C. isn"t able to
D. can"t

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