Question

【题目】—Who to clean the classroom yesterday?

—Li Ming.

A. helps B. helped C. is helping D. will help

Answer 1

【答案】B

【解析】此题考查一般过去时态。根据句意：“谁昨天打扫了教室？李明 ” 前半句出现了 yesterday，断定是过去时，所以用一般过去时态。故选B。