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
单项选择题 — Would you mind closing the window? —（）.
单项选择题 He is a popular movie star. His popularity（）in the high attendance at all his movies.
单项选择题 — I'll fly to New York on business next week. —Well,（）.
