提插补泻法中，补法的操作手法是

A．轻插重提，幅度小，频率快
B．轻插重提，幅度小，频率慢
C．重插轻提，幅度大，频率快
D．重插轻提，幅度小，频率快
E．重插轻提，幅度小，频率慢

I like getting up early in the morning. You know the morning air is so good      .

A．to be breathed

B．to breathe

C．breathing

D．being breathed