题目内容:
I called you just now, but you weren't in. Sorry, I ______ the reading room.
A.was in
B.have gone to
C.studied
D.had been to
参考答案:
I called you just now, but you weren't in. Sorry, I ______ the reading room.
A.was in
B.have gone to
C.studied
D.had been to