[题目]At the moment, Mr White is doing an to show students why it’s important to clean teeth.A.experimentB.operationC.instrumentD.invention 题目和参考答案——青夏教育精英家教网—

【题目】At the moment, Mr White is doing an to show students why it’s important to clean teeth.

A.experimentB.operationC.instrumentD.invention

【答案】A

【解析】

句意：那时，怀特先生正在做一个实验，展示给学生清洁牙齿为什么那么重要。

本题考查名词辨析。experiment意为“实验”，operation 意为“手术，操作”；instrument意为“仪器”；invention意为“发明”。由to show students why it’s important to clean teeth.可知，要给学生展示为什么清洁牙齿那么重要，这是做实验，故选A。

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