Edsion made a lot of inventions,___of great importance.A for which i think areB.which i think they areC.which i think are D.i think which are为什么选C

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Edsionmadealotofinventions,___ofgreatimportance.AforwhichithinkareB.whichithinktheyareC.whichithinka

Edsion made a lot of inventions,___of great importance.A for which i think areB.which i think they areC.which i think are D.i think which are为什么选C
Edsion made a lot of inventions,___of great importance.A for which i think are
B.which i think they are
C.which i think are
D.i think which are
为什么选C

Edsion made a lot of inventions,___of great importance.A for which i think areB.which i think they areC.which i think are D.i think which are为什么选C
首先,I think 是插入语,不要被迷惑,先去掉
根据句子意思:爱迪生做了很多发明,这是很重要的.
根据句子结构,逗号后面跟非限定性定语从句,逗号前面的整个句子是定语从句的指代词,因此排除D;
根据定语从句语法,排除错句B,因为出现了they
A中的介词for多余,没有动词与它匹配
be of +抽象名词 = be +形容词,用来表示主语的特征
be of importance = be important
简单说就是:Edison made a lot of inventions,which are important.