问题补充：
Her uncle to the factory .He will be back an hour .
A. has gone, after
B. has been, in
C. has gone, in
D. has been, after
答案：
A. has gone, after
B. has been, in
(答案→)C. has gone, in
D. has been, after
解析：have been to表示曾经去过某地，而have gone to 表示已经去了某地，因而本题中应该选 has gone to ，后半句表示将来时，用介词in ，故选C
