We discussed where to go for a whole morning, but we decided to stay at home_____.[ ]

A. at the end    

B. by the end    

C. in the end        

D. on end

国家以( )的建筑安装产品为对象，制定统一的预算和概算定额。

A．通用

B．标志性

C．假定

D．现实