---Why are you so hot?

---I_______football with my classmates and how I want to have a drink!

A．was playing

B．have been playing

C．have played

D．played

空气质量现状调查的资料来源有（）。

A.专家评述

B.进行现场监测

C.收集近三年与项目有关的历史监测资料

D.收集评价范围内及邻近评价范围的各例行空气质量监测点的近三年与项目有关的监测资料