operate|operates|operated|operating

他们不得不给他做手术。

They had to ___operate on him.

政府运营几家公立医院。

The government ___operates several public hospitals.

医生昨晚给那位老人做了手术。

The doctor ___operated on the old man last night.

这台机器运转良好。

The machine is ___operating well.