题目内容

---Someone’s been here. Who ___ it be? It looks like Helen.
---It ___ be Helen.She is ill in hospital.
A．must; mustB．might; couldC．can; mustn’tD．can; can’t
D
can 常用于表示否定和问句的推测。
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She didn't answer the phone.She ___ be asleep.
A．couldn'tB．mustn’tC．mightD．had to
--- I stayed at a hotel while in New York .
--- Oh, did you? You ＿＿＿＿ with Barbara．?
A．could have stayed??B．could stayC．would stay??D．must have stayed ?
—I didn’t see her yesterday,I looked for her everywhere,but couldn’t find her.
—Oh,but you　　.She was working in the office.
A．must haveB．ought toC．ought to haveD．can’t have
We _____ last night,but we went to appreciate the flowerbeds and streetlights in Tian’anmen Square instead.?
A．might studyB．could study?
C．should have studiedD．must have studied?
–Why, I couldn’t get you on the phone this morning.
--We _____ tennis in the yard when you called.
A．must be playingB．could be playing
C．must have playedD．must have been playing
--- ______ I call him back since you are in such poor health?
--- No, you needn’t. I’d rather he ______ disturbed.
A． May; shouldn’t beB． Shall; weren’t
C． Should; hadn’t beenD． Shall; wasn’t
--- Oh, my God! We just missed the last bus back home.
--- I’m sure we            it, but you were not in any hurry.
A．could catchB．had caught
C．would catchD．could have caught

22．Despite the fact that Betty is a lovely girl, she____be extremely difficult to work with sometimes.
A．mustB．shouldC．wouldD．Can

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