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最佳答案：from……to……be working hard in……
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最佳答案：Tom are working very hard.
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最佳答案：I will keep on working hard
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最佳答案：have to work hard
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最佳答案：Due to limited number of doctors, he works hard independently.
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最佳答案：The biggest gain came from hard work
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最佳答案：We are working hard to make this city more and more beautiful
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最佳答案：应该用两个"hard"才对.If you do not work hard today,you will have to look hard for new j
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最佳答案：A B C D E F G H I J K L M N1 2 3 4 5 6 7 8 9 10 11 12 13 14O P Q R S T U V W X Y
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最佳答案：so.she works hard every day and accomplishes the various of task well.