定语从句中that可以修饰period吗,一般说in...period还是on.period?

定语从句中that可以修饰period吗,一般说in...period还是on.period? 先行词是Period定语从句引导词是什么 英语翻译In that period it became accepted that studies on intera period做先行词,定语从句中的关系代词使用when 为什么不行,为什么老师说用where或者in which period是什么意思? in the corresponding period last 在此期间,during the period 还是 during that time tax period on check or money 是a period of time 还是times? transition period和transitional period的区别? during the period 和over the period 英语中副词修饰数词我遇到这样一句话 This period witnessed a total increase of