I stayed in Japan only a few matches, , I went through a series of hardship.
A. during when
B. at that time
C. during which time
D. of which time
网友回答
A. during when
B. at that time
(答案→)C. during which time
D. of which time
解析:考查定语从句,介词+which的用法,先行词是a few matches,说明是在那段时间,用during,which指a few matches,句意是:我只在日本呆了几场比赛,在那段时间,我经历了很多困难。选C。