题干

John was a student at this university from 1999 to 2003, ________ he studied hard and was made chairman of the Students’ Union.

A:during which

B:by which

C:during which time

D:by which time

上一题 下一题 0.0难度 选择题 更新时间:2013-10-10 08:25:04

答案(点此获取答案解析)

C