Question

【题目】—________ do you brush your teeth? ( )

—Because I want to have healthy teeth.

A.WhyB.WhatC.Who

Answer 1

【答案】A

【解析】

答句Because I want to have healthy teeth.句意为“因为我想有健康的牙齿。”可知问句是问原因要用why，问句句意为“为什么你要刷牙？”故选A。