问题补充:
--Is Mary in the classroom?
-- No. She to the library.
A. goes
B. had gone
C. has gone
D. would go
答案:
A. goes
B. had gone
(答案→)C. has gone
D. would go
解析:句意:--Mary在教室吗?--不,她去图书馆了。has gone to:表示某人已离开某地,说话时人不在原地(去了没回)。has been to :表示去过某地,说话时人不在某地(去过已回来)。根据No,故选C。