全陪需要做的准备工作主要包括：熟悉（）；准备（）；充实相关知识；与有关人员联系。
参考答案：接待计划 物质
概率等于1的事件称为（）
A.小概率事件
B.必然事件
C.不可能事件
D.随机事件
E.互斥事件
— The iPhone 4s has been on the market for some time. Have you got one?
— Yes, I________one during my visit to Hong Kong. [ ]
A. have bought
B. bought
C. had bought
D. would buy
