下列说法正确的是

A．液体中悬浮的无规则运动称为布朗运动

B．液体分子的无规则运动称为布朗运动

C．物体从外界吸收热量，其内能一定增加

D．物体对外界做功，其内能一定减少

--- I’ll come to see your performance at 9:00 tomorrow evening.

--- I’m sorry, but by then my performance ____ and I ____ reporters in the meeting room.

A．will have ended; will be meeting

B．will end; will meet

C．will be ended; am going to meet

D．is to end; will meet