—Whose shirt is this?—It ___ be Li Lei"s. It is too big for him. [

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—Whose shirt is this?
—It        ___ be Li Lei"s. It is too big for him.      [     ]
A. could
B. must
C. can"t
D. might

答案

举一反三

—May we leave the classroom now?
—No, you            . You              to leave until the bell rings.    [     ]
A. must; are allowed
B. can"t; aren"t supposed
C. needn"t; aren"t allowed

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The magazine             be Lily"s. Look, her name is on its cover.             [     ]
A. may
B. might
C. could
D. must

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These books _____ out of the reading room.  You have to read them here.             [     ]
A. must be taken
B. can"t take
C. can take
D. mustn"t be taken

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Your mother looks a bit disappointed. You           have told her the truth.     [     ]
A. do
B. must
C. can
D. want

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—The room is so dirty. _____ we clean it?   "
—Of course.    [     ]
A. Let"s
B. Would
C. Do
D. Shall

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