撤销书面挂失须持卡人本人凭（）办理。
A.银行卡
B.有效身份证件
C.密码
参考答案：A, B, C
It is bad _____________ to speak with your mouth full of food. [ ]
A. manner
B. way
C. manners
D. methods
幼儿园应该如何预防传染病?
