由南美各国足球俱乐部联赛冠亚军参加的足球赛被称为“解放者杯”，是为了纪念[ ]
A．玻利瓦尔
B．圣马丁
C．伊达尔哥
D．哥伦布
答案：A
Tom didn't go to school _____ this morning because he overslept. [ ]
A. at once
B. on time
C. by accident
D. at present
酸枣仁的功效是（）
A.润肠通便
B.敛汗
C.养血益肝
D.安神
E.活血
