高考英语动词及动词短语辨析练习237
题目内容

There are a lot of computers in the lab,and they need professional __________ to make sure they can be in a good state.

2021-07-07

A.operation

B.maintenance

C.service

D.advice

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