问题:
(2013·济南一中模拟)After graduation, Frank often thought of those who had helped him ________ his school life.
A.of
B.across
C.at
D.through
(2013·济南一中模拟)After graduation, Frank often thought of those who had helped him ________ his school life.
A.of | B.across |
C.at | D.through |
参考答案: