A:自然状态下,尽力深吸气后再尽力吹气
B:屏住呼吸后再尽力吹
C:跑步结束后再尽力吹
D:扩胸运动后再尽力吹
— Mr. Green, could you tell me ____________?
— Usually at the Thanksgiving Festival.
—Never mind. I _______________ here for only a few minutes.