SnowdenarrivedatSheremetyevoInternationalairportonJune...

問題詳情：

 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

【回答】

B

知識點：定語從句

題型：選擇題