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The sign warns people _____ the dangers of swimming in this river.

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________ youngest boy has just started going to ________ school.

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He _________ German so well because he ________ from Germany.

Find the mistake.

Let’s to get up early to go for a walk before breakfast.

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Richard Byrd was _____ first person in history to fly over ____ North Pole.

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The President _____ a speech, but in the end he _____ his mind.

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My purse_____ at the station while I _____ for the train.

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I suggest our rooms _____ before Tet Holiday.