Question

Is it Lily,the one who is good at maths,______is helping you with your studies?

A.Whom
B.That
C.which
D./

为什么选B
是什么从句？

Answer 1

你好

句子主干为：
Is it Lily that is helping you with your studies?
It is sb that/who 强调句句型，所以选择B
the one who is good at maths 是做插入语。

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祝你学习进步，更上一层楼！

不明白请及时追问，满意敬请采纳，O(∩_∩)O谢谢~~

追问

为什么不能理解为定语从句？？

追答

It is...that... 这明显就是强调句句型了

Answer 2

这个句里 that 和 who 一样，即
Is it Lily, the one who is good at maths, that is helping you with your studies?
that is helping you with your studies 是从句

Answer 3

是强调句，强调事情

Answer 4

强调句 it is...that ....