Question

【题目】 Turn off the water while you ________ your teeth or washing your hands.

A. were brushing B. brush

C. are brushing D. brushed

Answer 1

【答案】C

【解析】

试题考查时态。句意: 在你刷牙或洗手的时候, 关掉水。while意为“当……的时候”, 引导的时间状语从句常用进行时。由句意可知用现在进行时。故选C。