张生户口登记地为安徽W县，今年春节后到北京市打工半年以上，后又转到上海市继续打工，到年末进行人口登记时，张生应统计为()。

A．安徽W县的常住人口

B．北京市常住人口

C．上海市常住人口

D．上海市暂住人口

My brother is always on medicine, so he has ___ table tennis to keep fit. [ ]

A. taken up

B. built up

C. made up

D. held up