题目

He was＿＿＿today, but was asked to stay for＿＿＿week. 　　A.to have returned；another    B.returning；one more 　　C.returned；another              D.to return；other 答案： A be to＋have done结构,表示本应该做某事,但事实上却没有做。

查看本题答案和解析