Question

【题目】They won't leave school until they ______ their homework.

A. finishB. finishes

C. finishedD. will finish

Answer 1

【答案】A

【解析】

句意：直到他们完成作业才会离开学校。

根据until引导的时间状语从句不用将来时态，用一般现在时态来代替，主语they，谓语动词用原形；finish 动词原形，finishes 单数形式，finished 过去式，will finish 将来时态的结构；故选A。