1.-May I sit beside you, sir?

　　-No, you ________ . My girlfriend is coming soon.

　　( ) A.can't B.mustn't

　　C.needn't D.shouldn't

　　2.- ________ I speak to May, please?

　　-I'm sorry she ________ come to the phone because she isn't in.

　　( ) A.Might; won't B.Can; mustn't

　　C.May; can't D.Could; shouldn't

　　3.-I want to know if I ________ smoke here.

　　-No, you ________ . Could you see the sign "NO SMOKING" there?

　　( ) A.can; needn't B.must; can't

　　C.shall; won't D.may; mustn't

　　4.My wife never remembers my telephone number. She always ________ look it up.

　　( ) A.mustB.should

　　C.would D.has to

　　5.- ________ you pass me the English magazine, please?

　　-Sure. Here you are.

　　( )A.CouldB.Need C.Must D.Might

　　6.-Must I go to work with you?

　　-No, you ________ . Linda ________ go with me.

　　( ) A.mustn't; can B.can't; has to

　　C.daren't; should D.needn't; may

　　7.- ________ I tell Mary the test results?

　　-No, you ________ . She's already got the score.

　　( ) A.Will; won't B.Shall; needn't

　　C.May; mustn't D.Can; don't

　　8.You ________ be careful when crossing here-the traffic lights aren't working.

　　( ) A.mightB.ought to

　　C.could D.may

　　9.-Could I borrow you bicycle?

　　-Yes, of course you ________ .

　　( ) A.will B.shouldC.canD.need

　　10.Joan ________ come with us this afternoon, but she isn't very sure yet.

　　( ) A.can B.may C.must D.will

　　11.I ________ ask you the question because I thought I ________ be wrong.

　　( ) A.daren't; must B.mustn't; can

　　C.needn't; may D.can't; should

　　12.It's nearly eight o'clock. Mike ________ be here at any moment.

　　( ) A.needB.has toC.shouldD.can

　　13.The fire spread through the building very quickly but everyone ________ get out.

　　( ) A.had toB.would

　　C.could D.was able to

　　14.-What do you think of his answer?

　　-I don't think it ________ be right.

　　( ) A.shouldB.mightC.mustD.can

　　15.-Is John coming by train?

　　-He should, but he ________ . He likes driving his car.

　　( ) A.can'tB.needn't

　　C.may not D.mustn't

　　16.He doesn't have to work tomorrow, but you have got to, ________ you?

　　( ) A.don't B.haven't

　　C.haven't got D.can't

　　17.You ________ wake me up when I fall asleep, ________ you?

　　( ) A.haven't better; have

　　B.would not rather; would

　　C.had better not; should

　　D.had not better; must

　　18.-Why! I couldn't get you on the phone this morning.

　　-We ________ tennis in the yard when you phoned me.

　　( )A.could be playing

　　B.must be playing

　　C.must have been playing

　　D.should have played

　　19.-We didn't see him at the lecture.

　　-Neither did anybody else. He ________ it.

　　( ) A.may not have attended

　　B.mustn't attend

　　C.can't have attended

　　D.couldn't attend

　　20.-I came here by taxi and the driver charged me 50 yuan.

　　-Really? You ________ have come by bus.

　　( ) A.couldB.mustC.mayD.should

　　21.-Do you still remember when we went to the Great Wall?

　　-I can't remember it well, but ________ it have been sometime last May?

　　( ) A.shouldB.mustC.couldD.would

　　22.-I wonder why Mr Lin didn't come to work.

　　-He ________ have been ill.

　　( ) A.needn'tB.should

　　C.might D.can

　　23.-No one passed the mathematics examination today.

　　-I guess we ________ the exercises last night.

　　( ) A.could review

　　B.should review

　　C.might review

　　D.should have reviewed

　　24.She ________ the hospital so soon, for she hasn't yet recovered.

　　( ) A.wouldn't have left

　　B.shouldn't have left

　　C.needn't leave

　　D.hadn't left

　　25.Why didn't you tell me there was no meeting today? I ________ all the way here through the heavy snow.

　　( ) A.needn't have driven

　　B.can't have driven

　　C.must have driven

　　D.shouldn't have driven

　　答案与解析：

　　1.A。

　　2.C。请某人接电话用May/Can/Could I speak to...,please?表否定推测用can't。

　　3.D。may表允许。从NO SMOKING知道是不准、禁止等意思，故用mustn't。

　　4.D。表客观上不得不，这是记不住的后果。A表主观必须，不合题意。

　　5.A。表示客气请求，用Will/ Could/ Would you...?

　　6.D。Must I...?的否定回答用needn't/don't have to。可能性不大用may。

　　7.B。表征询意见用Shall I/he...?用于第一、三人称。从"她已经拿到分数单了"可知，没必要告诉她考试结果。

　　8.B。表建议应该做某事，用should/ought to。

　　9.C。回答别人可否借某物时，肯定句用Yes, you can.否定句常用I'm sorry/afraid...表婉言谢绝。

　　10.B。从he isn't sure知道，可能性小的肯定推测用may。

　　11.A。根据句意：我错了，才不敢问。

　　12.C。表本应该，实际并未如此。

　　13.D。

　　14.D。表否定推测，语气肯定。主句否定词not应转移到宾语从句的谓语。

　　15.C。从前后语境看，推测语气不肯定。

　　16.B。have to...反问用don't...? have got to...反问用haven't...?

　　17.C。had better的否定式是had better not，反意疑问句多用should。

　　18.C。对过去情况有充分依据的肯定推测。

　　19.C。对过去情况可能性的否定推测。

　　20.D。表过去本应该做而实际未做某事。

　　21.C。对过去情况可能性的疑问推测。

　　22.C。表对过去情况可能性较小的肯定推测。might比may的可能性更小。

　　23.D。表过去本该做而实际未做某事。

　　24.B。表过去本不该做实际又做了某事。

　　25.A。表过去做了本没有必要做的某事。

　　(文/湖南邵东十中刘向勤；英语通高中一年级版03～04学年第2期；版权归英语辅导报社所有，独家网络合作伙伴新浪教育，未经许可，不得以任何形式进行转载。)