One study shows while our sense of sight is used too much, our senses of touch and smell have been i

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【题目】One study shows __________ while our sense of sight is used too much, our senses of touch and smell have been ignored.

A. whether B. what

C. if D. that

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【答案】D

【解析】句意：一项研究显示如果我们的视觉用的太多，我们的触觉和嗅觉就会被忽视。此处用that引导从句作 shows的宾语。故选D。