《汤液醪醴论》“五脏阳以竭”的含义是（）

A.五脏阳气虚弱

B.五脏阳气乏竭

C.五脏阳气阻遏

D.五脏阳气失调

E.以上均不是

Tom could swim very well at the age of seven.      [ ]

A. at he age of seven    

B. at his age of seven

C. when she was seven    

D. when he was seven