We          play sports on school days. You know, we don't have enough time and have to do lots of homework.

A．often

B．usually

C．hardly

D．ever

营养不良患儿应用苯丙酸诺龙治疗，是因为其能够（）

A.促进消化功能

B.促进食欲

C.促进糖原合成

D.促进蛋白质合成

E.增强机体免疫功能