【題目】 I was watching TV the lights went off.

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

【答案】A

【解析】

試題分析:句意:當(dāng)燈熄滅的時(shí)候我正在看電視。A. when當(dāng)…時(shí)候,主句用一般進(jìn)行時(shí)態(tài),從句用一般時(shí)態(tài);B. while在……同時(shí),它只能表示一段時(shí)間,主句用一般時(shí)態(tài),后面從句一般用進(jìn)行時(shí)態(tài);C. as正當(dāng)…時(shí)候,主句和從句所表示的兩個(gè)同時(shí)進(jìn)行的動(dòng)作含有“一邊……一邊”之意時(shí),則習(xí)慣上要用as; D. For為了,因?yàn)椤=Y(jié)合句意可知選A。

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