-I'm afraid I can't return your book by Friday.    

-________. There is no need to return it hurriedly.  [ ]

A. Go ahead                        

B. Take it easy    

C. Come on                        

D. Take your time  

用泛制法制备水蜜丸时，炼蜜应加下列哪种溶媒稀释后使用( )

A．乙醇

B．开水

C．白酒

D．药汁

E．白醋