Question

-It is__he often fails in exams__makes his parents worries about him.

-So,he has to work whole-heartedly
A.what that B.that what C .that that D./ that
选C 请问为什么
为什么不选D？

Answer 1

It is that he often fails in exams that
makes his parents worries about him
It is 和第二个空的that 是强调句型。即去除it is ……that句子依然成立
that he often fails in exams makes his parents worries about him
然后句首的that引导主语从句，that he often fails in exams是主语
全句意思：他经常在考试中失败使得他的父母担心他。

希望满意！有疑问可以联系我~

Answer 2

用刘星的话说：这个句子真的很复杂啊！
It is__he often fails in exams 是全句的主句 是个主语从句 he often fails in exams 是这个主语从句的表语 也是个从句 that 是引导词 所以不能选D 否则就是语法错误 makes 是全句的谓语
his parents worries about him.全句的宾语 第2个that 强调 It is__he often fails in exams 全句是个强调句
很纠结啊

Answer 3

第一个从句什么成分也不缺，所以用THAT
第二个从句有IT做形式主语，也不缺成分，用THAT

根据选项，第一个空有两个选项有THAT，排除AD
第二个空有三个选项有THAT，排除B，选C……

Answer 4

两个that后面均引导一个从句，第一个that陈述的是一个事实修饰“it”，后一个that引导表语从句