一Let's play computer games!    

一That sounds interesting,_______ I don't have a computer．    [ ]

A．for    

B．only    

C．but

D．and

Austin Flint杂音见于

A．二尖瓣关闭不全
B．二尖瓣狭窄
C．主动脉瓣关闭不全
D．主动脉瓣狭窄
E．肺动脉瓣关闭不全