I ________ for Beijing next Saturday. Do you know when the earliest plane ________ on  Saturday?

A．am leaving; takes off

B．Leave; takes off

C．leave; is taking off

D．am leaving; is taking off

男性，64岁。近1年来每天午睡或夜间22点发生胸骨后压迫性疼痛，每次持续10分钟，坐起或含硝酸甘油3分钟缓解。

最可能的诊断是 （）

A.初发型心绞痛

B.劳累型心绞痛

C.卧位型心绞痛

D.变异性心绞痛

E.梗死前心绞痛