Lunar years were inconvenient for ag

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  A lot of research in medical science has been to improve human health.

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  Harmful environmental factors can the development of certain diseases.

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  Peter bought a car as a present for his wife two weeks ago.

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  The dog my father gave me is very lovely.

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  There has been growing public concern about the use of chemicals in food recently.

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  The higher the cost of living is, .

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  Last week, we an interesting film about the animal world.

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  The success of the company in such a market is remarkable.

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