He ______ the 8:20 bus because he didn’t leave home till 8:25.

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问题 He ______ the 8:20 bus because he didn’t leave home till 8:25.

选项 A、couldn’t have caught
B、ought to have caught
C、shouldn’t have caught
D、must not have caught

答案A

解析 because引导的分句用了过去时，因此本句是对过去的推测。而根据他出门的时间。可知他肯定没有赶上车，要用couldn’t表否定推测，答案为A项couldn’t have caught。must表推测时只用于肯定句中，ought to have done表示“本应该”，shoudn’t have done表示“本不应该”。

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专业英语四级

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He ______ the 8:20 bus because he didn’t leave home till 8:25.

专业英语四级

A、Becausehedidn’tdoitaccordingtotherequirementsofhisteacher.B、Becausetherespondentsheinterviewedareallstudent

Insomecases,asentencemaybegrammaticallyacceptable,but______inimplication.

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Moresurprising,perhaps,thanthecurrentdifficultiesoftraditionalmarriageisthefactthatmarriageitselfisaliveandth

(1)InthecaseofArchimedes,althoughhemademanywonderfuldiscoveriesofdiversekinds,yetofthemall,thefollowing,whic

(1)ClimbingtothetopofmynearesthillinSanFrancisco,mypurposeisnottoenjoytheviewbuttoexperienceabitoffresh

A、Havesomesortofbalancedlife.B、Gowatchmovieswithyourfriend.C、Goforatripwithyourfamily.D、Keepdoingexercises.

Soonaftertheaccidenthappened,thevehiclesinvolvedwere_______away.

Thegovernmenthaspromisedtodo_______liesinitspowertoeasethehardshipsofthevictimsintheflood-strickenarea.

A、Sheisprobablytheman’sgirlfriend.B、Shewashardtogetonwithlastnight.C、Sheisgoingonadatewiththeman.D、Shei

女性，27岁，已婚，平素月经正常，诉本次月经量少，淋漓不净20余天，突然出现左下腹撕裂样疼痛。查体：面色苍白，宫颈举摆痛明显，子宫正常大小。尿妊娠试验(±)。

A．化坚二陈丸加减B．银翘散加减C．桑菊饮加减D．除湿汤加减E．导赤散合黄连解毒汤加减

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