preposition of time

My wife's birthday is_______April.

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My son wakes up ________ 7 o'clock.

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The railway line was electrified______ the 1950s.

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I was born _________July.

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I was born _________ 1973.

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This temple was bulit_______ the sixth century.

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Please come to school_____ Friday.

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Let us have fun _______ Thanksgiving.

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The cab will be here_______ an hour.

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They work together _______ Sunday afternoon.

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