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【题目】Researchers are now conducting hibernation experiment and can use chemicals to put living cells into sleep-like state_____ they don’t age.

A. for which B. that

C. where D. which

【答案】C

【解析】试题分析:考查定语从句及其关系词的使用。句意:研究人员现在正在作冬眠实验,他们可以使用化学药物使活着的细胞进入睡眠状态,在这个状态中他们不会变老。先行词为state, 在从句中作地点状语,故C正确。

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