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问题: 单项选择,并给出解释

The TVs which made by our company sell best, but sever years ago no one could have imagined the role in the market that they _________?
A.were playing B.had playing
C.played D.were to play
选哪一个?理由是什么?能分析一下,that引导的是什么句吗?

解答:

答案是D

意思为:多年前没有一个人可以想得出这些电视在现在的重要性,是过去对现在的理解,现在某个时间在过去某个时间的后面,所以在过去某个时间来看的话是---将来,要用 be to(四个选项中唯一一个表示将来的搭配),然后因为是过去某个时间,所以是 were to而不是 are to.

C中的played在语法上不错,但是意思会改变为:多年前没有一个人可以想得出这些电视在当时的重要性,很明显是错误的.