单项选择题
A.to invite B.of being invited C.to be invited D.having invited
---- I do apologize for knocking you down. ----（）A.No, ...
单项选择题---- I do apologize for knocking you down. ----（）
A.No, I’m perfectly all right. B.You’re all right. C.Don’t worry about it. D.Not at all. Thank you
The world's supplies of copper（）A.have gradually being ...
单项选择题The world's supplies of copper（）
A.have gradually being exhausted B.are gradually exhausted C.has been gradually exhausted D.are being gradually exhausted
— Would you mind closing the window? —（）.A.Yes, please ...
单项选择题— Would you mind closing the window? —（）.
A.Yes, please B.No, I’m sorry C.Certainly not D.All right
