上海恒嘉贸易公司按CIP条件和信用证付款方式订立进口货物合同，下列选项中，( )不属于该公司应履行的义务。

A．办理货物运输保险

B．租船或订舱

C．申请开立信用证

D．付款赎单

With so many Western companies, banks, and others setting up offices here, our telephone directory can not _____ and has to be updated every few days.

A．keep back

B．keep up

C．take back

D．take up