肉桂的功效是（）

A.补火助阳

B.散寒止痛

C.温肺化饮

D.温经通脉

E.引火归原

To be successful,  you need to remember that ___________you might be very busy,  you need to be energetic and enthusiastic.

A．as though

B．in case

C．even if

D．now that