高考英语动词时态练习76
题目内容

In the past twelve months the research members ______ the effectiveness of many materials in a home building.

2021-06-23

A.had studied

B.would study

C.studied

D.have studied

题目答案

试卷相关题目

最新试卷
热门试卷

长理培训客户端 资讯,试题,视频一手掌握

去 App Store 免费下载 iOS 客户端