风湿性心脏病最常见的心律失常（）
A.Ⅰ度房室传导阻滞
B.房性期前收缩
C.室性期前收缩
D.心房颤动
E.心室颤动
参考答案：D
I fell in love with the pretty girl ________ I saw her. [ ]
A. first time
B. for the first time
C. the first time
D. by the first time
