题目内容

— What has happened to Tom ?
— I don''t know . He ____ lost .
A．could getB．might yet C．can have gotD．may have got
D
“may / might +不定式的完成式”表示对过去的行为不肯定的推测。
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相关题目
—I paid 200 dollars for the necklace. I think it's much too expensive.?
—Expensive? I don't agree with you. You so before you _______ it.?
A．should have said; boughtB．have said; bought?
C．had said; buyD．must have said; should buy?
If the Watergate Incident__________Nixon would not have resigned from the presidency.?
A．did not occurB．had not occurred
C．was not occurringD．be circling
— Please don''t make a noise .  — ____ . I''ll be as quiet as a mouse .
A．Yes , I won''t B．No , I won''t C．No , I''llD．Yes , I will
— You ought to have called her yesterday .    — Yes , I know I ____ .
A．ought to B．ought go have C．ought have doneD．ought to have called
A left-luggage office is a place where bags _______ be left for a short time, especially at a railway station.
A．shouldB．can?
C．mustD．will?
He’s working hard for fear that he__________.?
A．should fall behindB．fell behind?
C．may fall behindD．would fall behind
Water ____ be changed into vapour but it ____ be heated to its boiling point .
A．may ; canB．can ; must C．may ; needn''t D．must ; may
It has been announced that candidates ( 候选人)_____remain in their seats until all the papers has  been  collected .   
A．canB．willC．mayD．shall

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