As a student, you _____ spend so much time playing computer games, which is a waste of time. [ ]

A. may not

B. mustn't

C. needn't

D. won't

接待顾客的流程正确的是（）。

A、接待问候顾客→询问需求介绍商品→收款找零→递交商品出具小票→送别顾客

B、询问需求介绍商品→接待问候顾客→收款找零→递交商品出具小票→送别顾客

C、接待问候顾客→询问需求介绍商品→递交商品出具小票→收款找零→送别顾客

D、询问需求介绍商品→接待问候顾客→递交商品出具小票→收款找零→送别顾客