—When did you play the piano yesterday, Tom?            

—Mum, I _____ to play it as soon as I _____ home and finished playing when you came back.[ ]

A. began, arrived

B. will begin, get

C. begin, arrived at

小儿感冒夹痰的病机是（）

A.肺脏娇嫩

B.先天不足

C.乳食积滞

D.神气怯弱

E.肾气不足