问题补充:
(·吉林长春高中毕业班第一次调研)Many athletes are clear that the Olympic Games are the only time they will be watched by thousands of millions.
A. that
B. which
C. where
D. when
答案:
A. that
B. which
C. where
(答案→)D. when
解析:D考查定语从句。分析句子结构可知,“they will be watched by thousands of millions”为定语从句,先行词为time,空处在从句中作时间状语,所以用关系副词when。