Do you know___over there A.what happens B.what was happend C.what is happen D.what did happen

问题描述:

Do you know___over there A.what happens B.what was happend C.what is happen D.what did happen
为什么选C不选B呢

应该是选D,此处加did表示强调,“你知道那儿确实发生过什么吗?”happen是没有被动用法,如果使用为what is happenning还勉强可以选.