Question

Put the correct form of the verb 'to work' / Вставьте необходимую форму глагола to work: By the time Robert retired he … as a vet for thirty-five years already.​

Answer 1

By the time Robert retired he had been working… as a vet for thirty-five years already.​

Answer 2

Ответ:

By the time Robert retired he works as a vet for thirty-five years already

Answer 3

By the time Robert retired, he had worked as a vet for thirty-five years already.