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第 16 题 A petition needs to be signed.
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第 16 题 Andersen died on April 4, 1875.
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第 16 题 Genera Technologies has developed a method that determines whether water is clean.
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第 16 题 Some people dream but cannot remember their dreams.
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第 16 题 The people of KIRIBATI worry that one day their country will be taken away by a sudden high tide.
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第 16 题 A good reading habit can help your child do well at school.
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第 16 题 Black holes are part of space.
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第 16 题 It is estimated that around 10 percent of the flat roofs in Germany are green.
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第 16 题 Scotland is the right place to receive a first-class education.
