To save class time, our teacher has _____ students do half of the exercise in class and complete the other

half for homework. [ ]

A. us

B. we

C. our

D. ours

西方社会采取“国家福利型”社会保障模式的国家有( )。

A．美国

B．新加坡

C．北欧诸国

D．德国

E．英国