According to the United Nations, an aging society refers to one ____ 10 percent or more of the population is over 60, or 7 percent or more is over 65.
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where
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when
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which
D
that
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The hospital has been set up in ________ was a waste land many years ago.
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The school shop, customers are mainly students, is closed for the holidays.
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which
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The teacher asked Mary _______ she could tell him the general idea of the poem.
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