I have two grammars, are of great use. A. all of whichB. either of whichC. both of thatD.

发布时间：2020-08-17 12:18:28

I have two grammars,     are of great use.
A. all of which
B. either of which
C. both of that
D. both of which

网友回答

A. all of which
B. either of which
C. both of that
(答案→)D. both of which
解析：主句中的two表明不能选A.从句中的are表明不能选B. both of which用来引导非限制性定语从句.
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