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My hobby is ________ plants. (grow)

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What does your family recycle or ________? (use)

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________ regular exercise is good for our health. (do)

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They have three recycling bins in ________ apartment. (they)

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Liu Chang's father often ________ work around the house. (do)

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I will be ________ years old. (twelfth)

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He has ________ dogs. (fourth)

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My ________ birthday is coming. (twenty-three)

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There are ________ boys in our class. (twentieth)

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I met him in the street for the ________ time last night. (nine)