【题目】Now there is a system the waste is disposed of using the principles of ecology.
A. when B. that
C. where D. what
在线课程【答案】C
【解析】考查定语从句。句意：现在这有一套体系：废物可以使用生态的原则被处理掉。a system是先行词，它在定语从句中做抽象的地点状语，因此选C。
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Now there is a system the waste is disposed of using the principles of ecology.A. when B. thatC. whe
编辑：chaxungu时间：2026-04-27 03:04:54分类：高中英语题库
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