Complete the following sentences with the correct form of the verbs in brackets. My father (11. work)_ in Canada for the last year, so by the time he (12. return)_ the month after

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Complete the following sentences with the correct form of the verbs in brackets.

My father (11. work)_______ in Canada for the last year, so by the time he (12. return)_______ the month after next, I (13. not see)_______ him for fourteen months.