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

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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 before和after既可作介词，也可作连词，用来引导时间状语从句。

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考研英语一

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

考研英语一

Bythefirstsentenceinthefirstparagraph,theauthoractuallymeans.Theword"demoting"(Para.5).

Psychologistsoncebelievedthatthemotivethatcausedmentostrivetoattainhigh-levelmanagerialpositionswasthe"needfo

Peoplehavegoodreasontocareaboutthewelfareofanimals.EversincetheEnlightenment,theirtreatmenthasbeenseenasam

TheStudents’UnionofyourdepartmentisplanninganEnglishEvening.Youareaskedtoinviteoneofyourforeignteacherstoj

Asaresultoftheradio______forhelpfortheearthquakevictims,overamillionpoundshavebeenraised.

Howdoestheauthorthinkofhimself?Accordingtothepassage,thelawyershould

Threeyearsago,FrenchentrepreneurGaryCigewashelpingafriendhangamirrorinhiscountryhousewhentheyrealizedtheyn

Youmayborrowthebook______youkeepitclean.

SoBig.Fdamagedcomputerprogramsmainlyby.Thetoneofthetextcanbestdescribedas.

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