【題目】We were reading the newspaper _______ suddenly the light went out (熄滅).

A. when B. while C. as D. /

【答案】A

【解析】句意:我們正在看報(bào)紙,這時(shí)燈突然熄滅了。while當(dāng)……時(shí)候; as當(dāng)……時(shí)候;when引導(dǎo)的時(shí)間狀語從句可表示動(dòng)作突然發(fā)生,意為“這時(shí)”。句式:be doing when...,while as沒有這種用法。故選when

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