[求助]prep1-81 没有讨论

81.   (28921-!-item-!-188;#058&003760)

In the major cities of industrialized countries at the end of the nineteenth century, important public places such as theaters, restaurants, shops, and banks had installed electric lighting, but electricity was in less than one percent of homes, where lighting was still provided mainly by candles or gas.

(A) electricity was in less than one percent of homes, where lighting was still

(B) electricity was in less than one percent of homes and lighting still

(C) there were less than one percent of homes with electricity, where lighting was still being

(D) there was less than one percent of homes that had electricity, having lighting that was still

(E) less than one percent of homes had electricity, where lighting had still been

这题的答案只能用排除法做吗？谁能解释一下为什么第一个句子用过去完成时，而but后面的句子用过去时？

首先澄清一点，句子中是完全可以使用两种时态的！

关键是逻辑要正确

这句话可以这样理解：很多家庭是用蜡烛，但这个时候许多公共场所“已经”有电了

后面那句话是用was，过去时；那么表达“已经”，就自然是过去完成了

谢谢你。

祝你好运尽快进入心仪的学校