请在54处填写答案。(  )

请在54处填写答案。(  )

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51,49,87,13,45,55,63,( )

51,49,87,13,45,55,63,( )

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请在43处填写答案。(  )

请在43处填写答案。(  )

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The underlined pronoun "it" in the final paragraph refers to

The underlined pronoun "it" in the final paragraph refers to .(  )

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Which of the following statements is TRUE ac.cording to the

Which of the following statements is TRUE ac.cording to the passage?(  )

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