Hellow,Mike.It's you .I___you___inBeijing.How long have you been here

问题描述:

Hellow,Mike.It's you .I___you___inBeijing.How long have you been here
A hadn't known,are B haven't known,are C didn't know,were

C
C过去不知道而现在知道了.
B表示到现在我也不知道.
A表示我过去的过去不知道,但我见到你之前知道了.
D表示我现在不知道.
A,D与B与语境不符,故选C
望采纳