Question

【题目】— Susan stays alone in the classroom and looks sad.
— _________ to her?
A.What happens
B.What has happened
C.What is happening
D.What was happening

Answer 1

【答案】B
【解析】句意：——Susan一个人在教室里看起来很伤心。——她发生了什么事？A一般现在时表示经常发生，故排除；B现在完成时表示已经发生并对现在有影响（她伤心）；C现在进行时表示正在发生，不合语境。D过去完成时，不合语境。故选B。