— Shall we see the movie today or tomorrow?

— ______ It's all the same to me. [ ]

A. I hope so.

B. I'm sure.

C. It's up to you.

3岁患儿，经常患肺炎，无青紫。胸骨左缘第2肋间闻及粗糙响亮连续性机器 样杂音，可扪及震颤，心电图：左室肥大。X线心影增大，肺动脉段突出，肺野充血。最可能是

A．室间隔缺损
B．房间隔缺损
C．动脉导管未闭
D．法洛四联症
E．肺动脉瓣狭窄