Do you know over there?
A. what happening
B. what was happened
C. what is happening
D. what did happen
网友回答
A. what happening
B. what was happened
(答案→)C. what is happening
D. what did happen
解析：句意：你知道那里正发生什么事吗？happen发生，这个单词为不及物动词，没有被动形式，根据句意可知句子要用现在进行时态，故选C