Not far from the club there was a garden, ____ owner was seated in it playing      bridge with his

children every afternoon.   [ ]

A. its            

B. whose  

C. which

D. that

在较短时间内，在一定地区范围，选择有代表性的对象，对几项指标进行的一次性大数量调查属于（）

A.横断面调查

B.追踪性调查

C.问卷调查

D.筛查

E.半纵向调查