Thousands of people of Yushu cheered as the rescue team arrived, many of ____ even cried with joy. [ ]

A. those

B. them

C. whom

D. who

属于物业建设单位在开发过程中所订立的合同的是（）。

A、建设施工合同

B、售房合同

C、收益性物业的租赁合同

D、水电供应合同

E、专项维修工程承包合同