-What's your problem -I have lost sight of my mum and dad .i saw them__in front of me a momont ago
问题描述：
-What's your problem -I have lost sight of my mum and dad .i saw them__in front of me a momont ago
A.were walking B.to have walked C.walking
选项和具体解释 为什么要选这个
答
选C.see sb doing 看见某人正在做某事.
你有什么事吗?----我找不到我的爸爸和妈妈了,片刻之前,我还看见他们在我前面走着.B为什么不对呢？？？？？