问题
选择题
Snowden arrived at Sheremetyevo International airport on June 23, _____ he was prevented from leaving for six weeks after the U.S. canceled his passport.
A．which
B．where
C．when
D．what
答案
答案：B
题目分析：句中Sheremetyevo International airport是先行词，其在定语从句中作地点状语，故用关系副词where引导。句意：斯诺登于6月23日到达Sheremetyevo国际机场，美国取消他的护照之后，他在那里被滞留6个星期。