We should have ourselves _____ if we want to get the work _____ in the given time. [    ]

A. organize well; finished            

B. well organized; done

C. well organized; to be finished        

D. to be organized well; to be done

下列实验操作正确的是   [ ]

A．用100 mL量筒量2 mL水  

B．直接在量筒内配溶液  

C．用嘴吹灭酒精灯  

D．用胶头滴管滴加液体时，滴管要置于试管口的上方垂直滴入