Only five years ago, there ______a shortage of computer specialists.A、wasB、were

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问题 Only five years ago, there ______a shortage of computer specialists.

选项 A、was
B、were
C、has been
D、have been

答案 A

解析 The simple past tense is required. Choice (B) is past tense but does not agree with the singular subject shortage. Choice (C) is present perfect. Choice (D) is present perfect and does not agree with shortage.

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Only five years ago, there ______a shortage of computer specialists.A、wasB、were

Theofficemanagerwantsthecomputers______bytomorrow.A、willbeinstalledB、i

Onlyfiveyearsago,there______ashortageofcomputerspecialists.A、wasB、were

Whenpersonalcomputersfirstbeganshowingupinofficesaroundtheworld,p

Thesedays,everybodybuyscomputersoftware.Consumerspurchaseallkind

Asfortheshortage,Isuggest______thequantityinyourfutureshipment.A、your

Comco,Inc.,becametheleadingsupplierofcomputer______lastyear,lessthant

Towhomitmayconcern,AgoodnumberofrequestsforyourP-4computers(150).

Youmaybreachthisagreementifyousendcopyrightedcomputerfiles_______.A、el

Avarietyofpicturesarescannedintoaformofproper_____thatcomputerscanr

Worldleaderswere______totakeactionagainsttheincreasingfoodshortagesin

我的朋友都不抽烟。Noneofmyfriendssmoke．

Advertisementcanbethoughtof"asthemeansofmakingknowninordertobu

Scientistshavediscoveredstrandsofgeneticcodelinkedtoshortsight,th

Thehumanbraincontains10thousandmillioncellsandeachofthesemayhav

彩色多普勒血流显像仪，滤波器的主要作用是A.使频谱多普勒的幅度增加 B.滤除高

类风湿关节炎的主要表现是A.持续性发热 B.对称性多关节炎 C.游走性关节炎

在()计量属性下，资产按照其正常对外销售所能收到现金或者现金等价物的金额

HAMD24项版本总分达到或超过（ ）分，就可能是轻度抑郁或中度抑郁。A.24

金属烤瓷全冠肩台宽度A.0.18～0.25mmB.0.5mmC.0.5～0.8m

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