she went out to see what A is happening B is happened C was happening D was happened请把理由充分些,

问题描述:

she went out to see what A is happening B is happened C was happening D was happened
请把理由充分些,

C went 是过去式,说明动作发生在过去,所以后面的从句也要用过去式,排除AB,出去看看当然是看正在发生什么,所以用正在进行时,排除D,选择C

额,没注意前面是WENT
选C
用进行时,出去看外面发生什么事了。

C 主句过去时,从句也用过去进行时
【回答补充】他跑出去,是为了看外面正在发生什么事情,所以用过去进行时.