Choose the word or the phrase or sentence that best completes each unfinished sentence below or that best keeps the meaning of the original sentence if it is substituted for the underlined word or phrase.

_________ air is one of the many problems we have to solve.

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He ________ to find a job but he had no luck.

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If he ________ hard today, can he have a holiday tomorrow?

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Minh’s English is excellent. He speaks________.

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________we were tired, we sat down beside the stream.

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We couldn’t go on a picnic as planned __________ it was raining.

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The boy likes ________ games but hates ___________ his lessons.

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We can eat at home or, ________ you prefer, we can go to a restaurant.