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【题目】When the sun’s rays hit the earth, a lot of heat ______________ back into space

A.are reflectedB.is reflected

C.reflectsD.were reflected

【答案】B

【解析】

考查动词时态语态及主谓一致。句意:当太阳光线照射到地球上时,大量的热量被反射回太空。句子描述的是客观事实,应使用一般现在时;heat是不可数名词,谓语动词用单数,且与reflect是逻辑被动关系,应使用被动语态。故选B

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