I know a little bit about Italy as my wife and I ________ there several years ago.

A．are going

B．had been

C．went

D．have been

3岁男孩，平日健康，生长发育正常，体检时发现心尖部可闻及Ⅱ级短促柔和的收缩期杂音，传导局限，心电图检查正常，X线胸片检查正常，最大的可能性

A．风湿性心脏病

B．病毒性心肌炎

C．心肌病

D．先心病

E．正常心脏