题目

战国初年，晋国的卿大夫瓜分了晋国，形成的三个国家是 A.齐、楚、赵      B.韩、赵、魏     C.楚、燕、韩     D.秦、齐、魏 答案：B----- Your classroom is very clean. ----- Yes, it ______ every day. A. is cleaned              B. cleans            C. is cleaning