The workers ____ to finish the project on time.[ ]

A. have a try    

B. try their best    

C. try on

D. try out

治疗肾癌、膀胱癌阴虚内热证的代表方是（）

A.八正散

B.桃红四物汤

C.大补元煎

D.知柏地黄丸

E.小蓟饮子