--- Did you catch the train to Beijing last night?

--- No. It ______ for ten minutes by the time I got to the station.

A．has left

B．had left

C．has been away

D．had been away

关于膝内、外翻的叙述，下列不正确的是( )

A．正常人双脚并拢直立时，两膝及双踝均能靠拢
B．如双脚内踝靠拢时两膝部因双侧胫骨向外侧弯曲而呈O型，称膝内翻
C．当双膝关节靠拢时，两小腿斜向外方呈X型弯曲，使两脚内踝分离，称膝外翻
D．膝内、外翻多见于先天性畸形
E．膝内、外翻可见于佝偻病和大骨节病