◎ 题干
-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
◎ 答案
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“-Susan stays alone in the classroom and looks sad.-__________ to her?[ ]A. What happensB. What has happenedC. What is happeningD. What was happening…”主要考查了你对  【现在完成时】【特殊疑问句】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。