北京东城区示范校2011届高三综合练习（二）
Most of the roads were covered with thick snow, ____ made our journey more difficult.
A. one B. it C. which D. that
北京东城区示范校2011届高三综合练习（二）
Most of the roads were covered with thick snow, ____ made our journey more difficult.
A. one B. it C. which D. that
C