It _______ we had stayed together for a couple of weeks _______ I found we had a lot in common.

A．was until;when

B．was until;that

C．wasn’t until;when

D．wasn’t until;that

我国人口分布的地理界线是： (    )

A．秦岭——淮河

B．黑河——腾冲

C．京九铁路

D．天山