..选哪个,为什么请从语法上讲一下选择的原因谢谢啊

题目

..选哪个,为什么请从语法上讲一下选择的原因谢谢啊
He was still smiling when the door opened and his wife _________
A.went in B.entered in C.entered D.entered into

答案

a.went in,符合语法.但是,went in 的方向是远离说话者或者听话者.不是进来,而是进去.如果是came in 就对了.
C,entered,进入.时态与opened 一致,进入方向是向着 him/he,
enter,是及物动词,后面不需要介词.
实际上,这个题目选择A.went in ,有时候也是可以的.什么情况下可以?
小说中,就可能出现这样的叙述.
可以假定,HE住在一个透明的房子里,或者门窗透明,能被在房子外面的说话者看到.说话者看到he在笑.此时,他媳妇从回来,门很给面子,自动开了,她进去,he,仍然在笑.这一切都被说话者看到.
He was still smilling when the door opened and his wife went in.