问题描述:
定语从句题,为什么要用which而不用that?非限制性的定语从句不是用that么?
they helped us time and again,( )very kind of them.
A who were
B which was
C that was
D which were
they helped us time and again,( )very kind of them.
A who were
B which was
C that was
D which were
问题解答:
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