被动语态的构成:be+过去分词 — 英语词汇题
题目
用括号中所给动词的适当形式填空(注意主语与动词之间的被动关系):1. Yao Ming ______ (bear) in Shanghai in 1980. 2. These songs ______ (sing) by students at the school concert last Friday. 3. The classroom ______ (clean) every afternoon, so it always looks tidy.