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Though 10 dollars is not much, I think it necessary ______ (return) the money to you.

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It’s a pity that he ______ (not check) his answers in the exam.

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______ (give) a chance, I’ll try to do it again.

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Such a little child mustn’t ______ (allow) to cross the street alone. It’s dangerous.

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Let’s not ______ (forget) to go to the booking office and get some tickets for the film.

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Would you like ______ (choose) some nice books to read?

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The doctor advised him to give up ______ (smoke), but he didn’t listen to him.

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Be polite to him if you ______ (want) to get somebody to help you.

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It won’t be long before we ______ (meet) again.