—Why don't you go home?

—Because a lot of work________yet.

A．hasn't finished

B．hasn't been finished

C．has been finished

D．haven't finished

关于凭证审核和记账操作，下列说法错误的有（）。

A.凭证审核由具有审核权限的操作员来进行

B.凭证只能逐张审核，不能成批审核

C.记账操作每月可多次进行

D.上月未结账，本月同样可以记账