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问题: 英语

The electricity,( )was the most important
invention in the last century, is playing an
important part in our daily life.
A which do you think B which I think
C that I think D I think which
希望可以得到原因

解答:

选B,
非限定性定语从句,引导词指物时用which,指人时用who,不能用that,而i think 是插入语,紧跟主语后面.