问题
选择题
Most of the roads were covered with thick snow, ____ made our journey more difficult．
A．one
B．it
C．which
D．that
答案
答案：C
题目分析：句意：许多道路被厚厚的雪覆盖着，这使得我们的旅行更加的艰难。通过分析句子结构，可知横线之后是一个非限制性定语从句，且关系词指代前面整个主句的内容，故只能用which，选C。
