【推荐1】Bob ________ hard. Otherwise, he ________to be admitted to the key university.

A．can’t work; wouldn’t have failed	B．can’t have worked; wouldn’t have failed
C．mustn’t have worked; wouldn’t fail	D．mustn’t work; would fail

【推荐2】He ___ the money, he is not such kind of person.

A．can’t have stolen	B．mustn’t have stolen
C．can’t steal	D．may not steal

【推荐3】John ___ such a thing about you. He never speaks ill of you behind your back.

A．can’t have said	B．might not have said
C．couldn’t say	D．mustn’t have said

【推荐1】— Excuse me, where is George?
— George ________ too far. His coffee is still warm.

A．must have gone	B．might have gone
C．can’t have gone	D．needn’t have gone

【推荐2】—You look so tired. You__________late last night.
—Yes, I had to finish an important report last night so I didn't sleep at all.

A．could sleep	B．should have slept
C．may sleep	D．must have slept

【推荐1】I before I came to the new school, for my classmates here are very friendly to me.

A．mightn’t worry	B．mightn’t have worried
C．needn’t worry	D．needn’t have worried

【推荐2】 I _________ have written to him because he phoned me shortly afterwards.

A．ought to	B．must
C．couldn’t	D．needn’t

【推荐3】— You didn’t wait for Mr. Smith last night, did you?
— Actually, we ________. He didn’t return home at all.

A．couldn’t have waited	B．needn’t have waited
C．didn’t have waited	D．should wait

【推荐2】Most of the students in the Occupy Central movement in Hong Kong ______ have participated for more rights, but what they did caused serious effects on people’s living.

A．should	B．might
C．would	D．Can

【推荐3】-–Mary knows the city quite well.
--She______ well have been there before.

A．need

B．could

C．should

D．may