单位和个人办理结算，因错填结算凭证，致使银行对结算凭证或对款项不能解付，影响资金使用的，应由( )。

A．银行与责任单位和个人负连带责任

B．责任单位和个人自行负责

C．责任单位和个人负行政责任

D．责任单位和个人负赔偿责任

Busy as they are, parents should________at least two hours every week to spend with their children.[ ]

A. set out  

B. set away

C. set aside  

D. set off