10. We went through a period _____ communications were very difficult in the rural areas.
A. which B. whose C. in which D. with which
10. We went through a period _____ communications were very difficult in the rural areas.
A. which B. whose C. in which D. with which
C
先行词为period，从句中缺少时间状语，所以应用when或in which引导后面的定语从句。