Question

【题目】Don't leave the tap_______ all the time when you brush teeth_______ It's a bad habit.

A. run B. to run C. running D. runs

Answer 1

【答案】C

【解析】句意：刷牙时不要让水龙头一直流水。那是一个坏习惯。Leave sb. doing sth使某人不断地做某事；leave sb. to do sth，把某人留下来做某事。不要让水龙头不停地流水，用leave sb. doing sth.故选C。