I______ waiting for two months by the time I received the reply.

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问题 I______ waiting for two months by the time I received the reply.

选项 A、must be
B、had been
C、could be
D、must have been

答案B

解析动词时态题。根据题意，have been waiting for two months这件事是从过去的时间开始，一直到我收到回复。如果某一动作：(始于)过去一(延续到)另一个过去的时间，则用过去完成时，因此选择B。

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专业英语四级

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I______ waiting for two months by the time I received the reply.

专业英语四级

Readingtooneselfisamodernactivitywhichwasalmostunknowntothescholarsoftheclassicalmedievalworlds,whileduring

He______tenlecturesonAfricanliterature,butheonlygavethreebecauseofhisillness.

Theworld’sgovernmentshavedone______nothingtocombatthethreatofnuclearaccidents.

Thereareveryoftenstrongopinionsexpressedaboutwhatmakesagood.wine.Atasimplelevel,agoodwineisonethatyouenj

Ofthethousandsofknownvolcanoesintheworld,the______majorityareinactive.

Accordingtotheexpert’sstudy,thelevelofhappinessinwhichperiodoflifeisthelowest?

WhateverIsay,mywifewould______immediately,whichmakesmelosefaceinfrontofmyfriendsevenbeforemycolleaguesmany

IntermsoftheevolutionoflifeonEarth,humanbeingshavejustarrived.【C1】______theirshorttimeonEarth,however,peopl

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在定价策略中的营销道德问题主要可以归结为价格与产品本身不相匹配，具体表现有：、、、。

男，25岁，突然出现短暂意识丧失，肢体抽搐，醒后剧烈头痛、呕吐。体检：GCS5分，神志模糊，瞳孔右侧8mm。左侧3mm，颈有抵抗，右侧眼底玻璃体下有片状出血。体温37℃，血压135/70mmHg。下列治疗哪项不正确

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IntermsoftheevolutionoflifeonEarth,humanbeingshavejustarrived.【C1】______theirshorttimeonEarth,however,peopl

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男，25岁，突然出现短暂意识丧失，肢体抽搐，醒后剧烈头痛、呕吐。体检：GCS5分，神志模糊，瞳孔右侧8mm。左侧3mm，颈有抵抗，右侧眼底玻璃体下有片状出血。体温37℃，血压135/70mmHg。下列治疗哪项不正确

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“没有英雄的时代也很难造就一代英雄”是强调()

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