请问这个选择题,应该选什么为什么?其它的为什么不对呢?many students face problems when they have to study a subject ____.A.that they think it is difficult B.that they think is difficult C.which they think that is difficult D.they

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请问这个选择题,应该选什么为什么?其它的为什么不对呢?many students face problems when they have to study a subject ____.A.that they think it is difficult B.that they think is difficult C.which they think that is difficult D.they

请问这个选择题,应该选什么为什么?其它的为什么不对呢?many students face problems when they have to study a subject ____.A.that they think it is difficult B.that they think is difficult C.which they think that is difficult D.they
请问这个选择题,应该选什么为什么?其它的为什么不对呢?
many students face problems when they have to study a subject ____.
A.that they think it is difficult B.that they think is difficult
C.which they think that is difficult D.they think it is difficult

请问这个选择题,应该选什么为什么?其它的为什么不对呢?many students face problems when they have to study a subject ____.A.that they think it is difficult B.that they think is difficult C.which they think that is difficult D.they
选B
这是定语从句 先行词subject+关系代词which或that +定语从句
关系代词在定语从句中是做成分的,所以从句中的it或that要去掉,因为与subject重复了

选B
that引导定语从句，修饰subject，that在从句中担任宾语，所以再加个it就是多余的了，跟that重复了

C

Bthat they think 是后置定语修饰subject，真正的谓语是is

选B
这是名词性从句的常用考点，先行词是subject,根据后面句子所缺成分进行筛选，只有B是正确的

B,定语从句

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