He grabbed his suitcase and gave the impression he was boarding the Tokyo plane.
A. when
B. where
C. that
D. what
网友回答
A. when
B. where
(答案→)C. that
D. what
解析：主要测试同位语从句。由语境可知译文为：他快速的抓起行李包，并且留下深刻印象：他即将登陆开往东京的飞机。由以前所学同位语从句的定义可知句子中名词impression的内容既是后面句子 he was boarding the Tokyo plane的内容。故此归为同位语从句。