Lin Tao can't be at home. I saw him _______here a few minutes ago.

A．plays

B．to play

C．playing

D．played

左心衰竭最早出现的症状是（）

A.双下肢水肿

B.咳嗽、咳痰

C.胸闷、心慌

D.劳力性呼吸困难

E.力、头晕