They operate on (a )when they need to.这是一个完形填空,主题是兽医咋样治疗动物.(⊙_⊙)?

Unfortunately, the expert from Australia refused to __.A operating B operate C operate on D be operate on They operate on (a )when they need to.这是一个完形填空,主题是兽医咋样治疗动物.(⊙_⊙)? operate on 紧急! the doctor said that they could do nothing but___(operate) on him at noce They can only cure him of his illness if they operate on him.请帮助译成中文 the man over there was injured in a car accident yesterdayA．operate on B．operating on C．being operated on D．to be operate The doctor told Mary's mother that Mary should _____ at once.A)operate on B)be operated C)be operated on D)operate Dr. Ma used to two or three persons in the hospital.A. operate on B. operating on C. operate for D. operating for the doctor needs operate on him 还是needs to operate? The famous doctor （）（operate）on a special patient in a few days 动词填空 The doctors （）（operate）on a patient when the light suddenly went out 动词填空.. A lot of introductions on how to operate the machines are written in English operate -The machine is too old to work -we need to buy a new one that is easy to_A.operate B.operate on C drive D.run operate on的同义词是哪个? OPerate变被动时还加on吗 很急 跪求翻译航海英语Merchant ships are designed to carry cargo．Some are also designed to carry passengers．They can operate as liners．These are employed on regular routes on a fixed timetable．A list of their arrival and departure da the problem is (how) we can( operate) the new machine( on) such (a) short time.英语挑错,括弧中的,为什么?