18.New technology____________to stop the students from cheating in the exam last year.(  )
A.is usedB.usedC.was used

分析 去年在考試中運(yùn)用了新技術(shù)阻止學(xué)生們作弊.

解答 答案:C
根據(jù)last year可知,這是表示過(guò)去的時(shí)間狀語(yǔ),所以運(yùn)用一般過(guò)去時(shí)態(tài);又因?yàn)橹髡Z(yǔ)New technology是動(dòng)詞use的承受者,應(yīng)該用被動(dòng)語(yǔ)態(tài).一般過(guò)去時(shí)態(tài)的被動(dòng)語(yǔ)態(tài)的構(gòu)成是:was/were+動(dòng)詞的過(guò)去分詞,主語(yǔ)是單數(shù),所以用助動(dòng)詞用was,故選C.

點(diǎn)評(píng) 判斷動(dòng)詞的時(shí)態(tài),要通過(guò)所給的時(shí)間狀語(yǔ)或語(yǔ)境去判斷動(dòng)詞存在的狀態(tài);判斷動(dòng)詞的語(yǔ)態(tài),要看看主語(yǔ)是謂語(yǔ)動(dòng)詞的執(zhí)行者還是承受者.

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