There is a system the waste is disposed of using the principles of ecology.A. whichB. wher

发布时间：2020-08-17 06:14:27

There is a system     the waste is disposed of using the principles of ecology.
A. which
B. where
C. that
D. at which

网友回答

A. which
(答案→)B. where
C. that
D. at which
解析：考查定语从句：句意：现在有个系统利用生态学原理处理废物。先行词是a system，定语从句中缺少地点状语，用where引导定语从句，D选项如果是in，也是对的，选B。
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