1 . The woman was walking about outside the operation room, because her son_________(operate) on. (用所给词的适当形式填空)

2 . The doctor has just ________________ on the girl and the ________________ is quite successful.(operate) (所给词的适当形式填空)

3 . Doctors ________ on the injured person immediately and the ________ was very successful.(operate) (所给词的适当形式填空)

4 . As an ________ , you must think carefully about how to ________ your restaurant and improve the service. (operate) (所给词的适当形式填空)

5 . In the event of the machine not ________ (operate) correctly, an error code will appear. (所给词的适当形式填空)

6 . The _______ is carefully _______ the big machine according to the _______ guidance. (operate) (所给词的适当形式填空)

7 . He was badly injured in the accident last night and __________(operate) on now. (所给词的适当形式填空)

8 . The course qualifies you ________(operate) this kind of machines in any area of the country. (用所给词的适当形式填空)

9 . The ________(operate) has to be able to carry out routine maintenance of the machine. (所给词的适当形式填空)

10 . What skills are needed ________ (operation) this machine?(所给词的适当形式填空)