--Is Mary in the classroom? No. She to the library. A. goesB. had goneC. has goneD. wou

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。