Though iPads and E-readers have increasingly better screen clarity, the idea that every time a person reads a book,newspaper or magazine,what they will require an energy source is frightening.
本题重点考查人称代词指代用法。画线部分是that引导的同位语从句中的一部 分,这个同位语从句中嵌入了一个主从复合句,从句是every tim e引导的时间状语从 句,其中的主语是单数,故而主句中的代词要用第三人称单数。四个选项中首先排 除C和D , 其中的when, that是多余的。B也不合适,由于前面已经明确是时间状语从句,就不能再用表示并列的and。故选A ,前后形成一个主从复合句。
[参考译文]尽管iPad和电子阅读器的屏幕清晰度逐步提高,但是一想到每次读书、读报 或读杂志时都需要能源,还是让人望而却步。
[语法拓展] 引导时间状语从句的普通类从属连词有:when, while,as,before, after,since,till/ until, whenever, as soon as等。
e.g. We must strike while the iron is hot 我们必须趁热打铁。
Once time is gone,you w ill never get it back.时间一旦失去就再也得不到了。
注意:as soon as, the moment, every time, each time, the minute, the instant, the day, the week, the year, the first time, next time, any time, the last time, all the time,from the time,by the time,immediately, instantly, directly等表示时间的词语, 后面也可以接时间状语从句。
e.g. I recognized you the minute I saw you.我一见到你,就认出 了你。
By the time he was fourteen,he had built his own lab .到他十四岁的时候,他已建起自己的实验室。