单元评价结论经整合后可得到（）的评价结论。
参考答案：系统安全
--- Would you please ______ your shoes on the floor?
--- Sorry. I won't do it any more.[ ]
A. not drop
B. not to drop
C. not dropping
D. no dropping
邮政储蓄客户办理随机换折业务时，必须由客户本人提供有效实名证件，不得代理。
A、正确
B、错误
