Choose the best answer.

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

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

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My parents hope to travel around _____ world next summer.

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Jimmy, dressed in jeans and a black leather jacket, arrived at the party _____ his motorbike.

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Frank: “What about going to the waterpark?”

William: “_____”

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Drinking too much alcohol is said to _____ harm to our health.

Find the mistake.

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

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We were made_____ hard when we were at school.