What ______just now?A.was happened  B.were happened  C.happened   D.happens

问题描述:

What ______just now?A.was happened  B.were happened  C.happened   D.happens
选C,请帮我分析一下,

happen"发生",没有被动语态,排除A和B;just now "刚才",应该用一般过去时态,排除D.