杭州交通信息网cm和BDM什么职位:英语问题 请告诉我原因 48.5
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he made another discovery,___of great importance to science
a.which i think is
b.which i think it is
c.which i think it
d.i think is
a.which i think is
b.which i think it is
c.which i think it
d.i think is
选A, 变成两个句子是：he made another discovery. I think it is of great importance to science.;which引导非限制性定语从句并且作为think的宾语，所以which和it肯定不能同时出现排除bc，which也不可以省略，随意选a。还有一个语法点：of+名词＝形容词
http://zhidao.baidu.com/question/8280858.html
which引导非限制性定语从句
i think是插入语，可去除
A,这是个非限定性定语从句。在非限定定语从句中which不能省略排除d,
b和c多了it，which本身在从句中已经是主语了，it是多余的，固只有a 是正确的。