A man escaped from the prison last night. It was a long time ______ the guards d

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问题 A man escaped from the prison last night. It was a long time ______ the guards discovered what had happened.

选项 A、before
B、until
C、since
D、when

答案 A

解析考查It is...before的用法。犯人越狱发生在警卫发现之前，It is...before意为“(……之后，)才……”，符合题意，为正确答案，又如：It was several months before I was fit for the job．(几个月后我才适应了这工作。)until意为“直到……为止，直到……才”，一般不用于It is...until肯定句中，例如：They drank on until midnight(他们一直喝到半夜。)

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A man escaped from the prison last night. It was a long time ______ the guards d

Taylorwasarrestedand______sentencedtothreeyears’imprisonment.A、successi

______wasdrunkagainlastnight.A、ThatbrotherofyoursB、ThatyourbrotherC、

Theprisonerpleadedthathe_____allowedtoseehisfamily,whodidnotknowo

John’sscoreonthetestisthehighestintheclass;he______lastnight.A、mus

"Tinalooksespeciallyprettytonight.""Yes,shealwayslooksherbestin_

It’stime__aboutthenoisepollutionlateatnight.A、somethingwillbedoneB、

Whywastheyoungwomanheldupinthefederalimprisonmentcenter?[originaltex

Whatisthenewsmainlyabout?[br][originaltext]Twooftheprisonersrel

Whatisthenewsmainlyabout?[originaltext]Twooftheprisonersreleased

Nobody______theguardswasinthebuilding.A、butforB、apartfromC、exceptD、i

Since2007,theAmericanPsychologicalAssociation(APA)hasconductedasurve

[originaltext]M:Oneofthemostcommonquestionsweaskaboutpeople’sbehavio

Tworelatedparadoxesalsoemergefromthesamebasicconceptionoftheaes

[originaltext]Astheworldpopulationrises,thedemandformeat,eggsand

患者男，30岁，头痛、头晕，伴血压高2年。体检：BP190/110mmHg（右）

客户的风险偏好类型不包括()。A:保守型 B:轻度保守型 C:进取型 D:

为病人进行鼻饲时，胃管插入长度相当于病人的A.眉心至剑突长度 B.眉心至胸骨柄

下列哪项不是肺痨的别名A.尸疰 B.劳疰 C.伏连 D.呷嗽

武当公司与洪湖公司签订了一份钢材购销合同，同时约定，因合同效力或合同的履行发生纠

A.唑吡坦 B.硫喷妥钠 C.地西泮 D.氟西汀 E.舒必利分子中含有咪