初三选择题,帮忙回答

问题描述:

初三选择题,帮忙回答
do you know____?
a how to get there b how did he come here
c how he came here d why he didn`t come here
这道题为什么选c?a和d为什么不对

这是个宾语从句
如果选A的话,那么从句中少主语,你不知道是问谁怎么来.
如果选D的话,前面应该加个宾语:do you know the reason why he didn't come here.
C就不用说了吧.