-Whose book is this?-It _________ be Li Ping"s because there is his name on it.[

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-Whose book is this?
-It _________ be Li Ping"s because there is his name on it.[     ]
A. must
B. may
C. can"t
D. could

答案

举一反三

-Who is the woman that is washing clothes? Is it your mother?
-No, it _______be her. She is much thinner.   [     ]
A. mustn"t
B. may not
C. can"t
D. needn"t

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Here is a beautiful dress. The owner________ be a boy.  [     ]
A. must
B. can"t
C. might
D. could

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You ________ knock at the door. Just come in.   [     ]
A. don"t have to
B. can"t
C. mustn"t
D. couldn"t

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-There is a mobile phone on the desk. Is it Li Yong"s?
-It __________ Li Yong"s. He went to Shanghai two days ago.[ ]
A. can be
B. can"t be
C. must be
D. might be

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You have walked such a long way on such a hot day. You __________ be tired and thirsty.[ ]
A. can
B. must
C. may
D. should

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