问题补充:
We went through a period communications were very difficult in the countryside.
A. which
B. in which
C. whose
D. with which
答案:
A. which
(答案→)B. in which
C. whose
D. with which
解析:考查定语从句。in which介词加关系代词,相当于when定语从句是communications were very difficult in the rural areas句意:我们经历了这样的一个时期,在那个时期中通信在乡村是非常困难的