...about them()that they are the most competent engineers I...
百度试题 题目All I can say about them()that they are the most competent engineers I have ever seen. A.have B.has C.are D.is 相关知识点: 试题来源: 解析 D All I can say about them是从句作主语,看作单数,故用单数动词。反馈 收藏 ...