(南京市2008—2009学年度第一学期期末调研测试卷)—Is this the painting ______ you offered $1000 for on the Internet?

—Yeah, I will give you 15% discount if you like it.

A．when

B．which

C．as

D．what

假定要动态分配一个类型为worker的具有n个元素的数组，并由r指向这个动态数组，则使用的语句是______。