when I saw his pale face,I____what_____A.realized,had happenedB.was realizing,was happeningC.realized,has happenedDhas realized,had happened
问题描述：
when I saw his pale face,I____what_____
A.realized,had happened
B.was realizing,was happening
C.realized,has happened
Dhas realized,had happened
答
A 根据事态来判定
答
A.realized,had happened
我意识到发生了什么。
意识，点动词， 不能用进行时，B不对
句子是过去时，D不对。
看后半句C用现在完成时，也不对。
答
选A.过去时之前发生的用过去完成时.