二维超声心动图胸骨旁长轴观可见（）

A．主动脉瓣及肺动脉瓣

B．主动脉及二尖瓣

C．室间隔与房间隔

D．二尖瓣与三尖瓣

E．主肺动脉与房间隔

— Do you know __________ they got to know each other?

— It was last year ________ they both taught English in China.

A．when was it that; when

B．when it was that; that

C．when it was that; when

D．when was it that; that