【题目】Hangzhou marathon is a race _______aim is to help people know the importance of taking exercise.
A. where B. whose C. which D. that
在线课程【答案】B
【解析】
试题分析：考查定语从句。句意：杭州马拉松是旨在帮助人们了解锻炼的重要性。先行词是a race，______aim is to help people know the importance of taking exercise定语从句缺少代词，故选B项。
考点 : 考查定语从句