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It was his job to repair bicycles and at that
time he used to work fourteen hours a day.
It was his job to repair bicycles.
to do 作主语，通常后置，用it 作形式主语.It is…to do…
例：it is my job to teach. 我的工作是教书
it was Tom’s hobby to read. Tom的爱好是读书
it is the trainer’s duty to train employees.
He saved money for years and in 1958 he bought a small work-shop of his own.
In a few years, the small work-shop had become a large factory which employed seven hundred and twenty-eight people.
In his twenties Frank used to make spare parts for aeroplanes.
In a few years the small workshop had become a large company which employed seven hundred and twenty-eight people.
He was still smiling when the door opened and his wife came in.
