Having a trip abroad is certainly good for the old couple, but it remains ______ whether they will enjoy it.[      ]

A. to see

B. to be seen

C. seeing

D. seen

如果某IT项目客户的业务部署在其Internet网站上，客户的供应商、经销商等合作伙伴的业务也部署在各自的Internet网站上。客户要求自己的IT系统能通过Internet和其合作伙伴集成起来，开发者首先要考虑的技术是______。

A．C/S和HTML

B．B/S和HTTP

C．COM和Cache

D．Web Service和XML