业主方主要管理部门的投资控制.进度控制都包含()任务。

A.参加评标及合同谈判

B.组织对投标单位的资格预审

C.比较设计方案是否符合设计要求

D.审核建设项目总概算和施工图预算

E.编制设计阶段资金使用计划并控制其执行

The group of students went to the suburb, did some research work, and ________ the water

in the river    to see if it had been polluted.[      ]

A. proved          

B. boiled          

C. tested          

D. exchanged