问题
选择题
Rock-climbing is a breathtaking activity, very popular nationwide among young people, ______ cooperation as well as courage plays an important role.
A．who
B．where
C．which
D．of which
答案
答案：B
题目分析:考查定语从句。分析结构可知此处是定语从句，从句中意思完整，不缺少成分，故用关系副词引导，答案选B。攀岩是一种惊险的活动，它在全国范围内的年轻人中非常流行，在这种活动中勇气还有合作起着重要的作用。