持证人员从事会计工作，应当自从事会计工作之日起（）日内，向会计从业资格管理机构办理注册登记。
A．10
B．30
C．60
D．90
参考答案：D
高度超过()米二类公共建筑应设置消防电梯。
A．30
B．32
C．35
D．40
We often ________ at Halloween and sometimes it is not easy to know each other. [ ]
A. play with each other
B. have a party
C. dress up
D. knock on the doors
