Question

【题目】You have to stay at home if your homework________ before five o'clock.

A. isn't finished B. will finish

C. finished D. wasn't finished

Answer 1

【答案】A

【解析】句意：如果你的家庭作业没有在五点之前完成，你必须呆在家里。本句是if引导的条件状语从句，主句用一般现在时，从句也应用一般现在时态；主语homework与“finish”是被动关系，所以使用一般现在时态的被动句。is/am/are+动词的过去分词。finished是finish的过去式或过去分词。故选：A。