I believe he ______an accident, otherwise he would have arrived on time.

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问题 I believe he ______an accident, otherwise he would have arrived on time.

选项 A、would have had
B、could have had
C、should have had
D、must have had

答案D

解析 “主语+must +have+过去分词”结构，表示对过去事实的推测。例如：The road is wet. It must have rained last night. (路是湿的，昨晚肯定下雨了。)．I didn’t hear the phone. I must have been asleep. (我没有听见电话铃响，我肯定是睡着了。)

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成人本科学位英语

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I believe he ______an accident, otherwise he would have arrived on time.

成人本科学位英语

Onlywhenyouhaveagoodknowledgeofgrammar______writecorrectly.

Toooftenyoungpeoplegetthemselvesemployedquitebyaccident,notknowingwhatliesinthewayofopportunityforpromotion,

Thebuildingaroundthecornercaughtfirelastnight.Thepolicearenow______thematter.

Ontopofthemountain______,aroundwhichweregreenthicktrees.

Elephantsdon’tforget—atleast,femaleelephantsdon’t.Elephantfamiliesarematriarchal.Andthesocialknowledgegainedbyt

Lookingbackonmychildhood,Iamconvincedthatnaturalistsarebornandnotmade.Althoughwewerebroughtupinthesameway

Therewasonethoughtthatairpollutionaffectedonlytheareaimmediatelyaroundlargecitieswithfactoriesandheavyautomob

Anylenderabouttomakealoanwishestoknowtherealrateofinterest;i.e.,thecontractualrateofinterestlesstherate

A．脾曲结肠癌，DukesC期B．乙状结肠癌，DukesA期C．横结肠癌D．乙状结肠癌，DukesD期E．降结肠癌，DukesB期根治术后5年生存率为30％的是

属疾病防治中的三级预防是

不在行经期间，阴道大量出血，来势急者称为

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律师事务所是律师的执业机构，下列选项中关于律师事务所的说法哪些是正确的?()

涵洞施工时钢筋混凝土拱圈和盖板现场浇筑宜连续进行。当涵身较长，不能一次连续完成时，可()。

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