— Why, Jack, you look so tired!

— Well, I _____ the house and I must finish the work tomorrow. [ ]

A. was painting

B. will be painting

C. have painted

D. have been painting

在煤矿设计阶段，储量管理人员应详细了解的内容有（）。

A.设计意图

B.采煤方法

C.煤柱留设

D.煤层配采

E.工作面、采区损失率指标