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

问题描述:

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?

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.为什么不能理解为定语从句??It is...that...这明显就是强调句句型了