---  _____ you_____your room yet?  

--- Yes. I_________it a moment ago.

A．Did；clean；cleaned

B．Have；cleaned；have cleaned

C．Have; cleaned; cleaned

D．Will; clean; clean

左心衰竭时，最早出现的症状是　

A．咳嗽、咳痰、咯血　

B．夜间阵发性呼吸困难　

C．劳力性呼吸困难　

D．端坐呼吸　

E．乏力、疲倦、头昏、心慌