从所给的四个选择中选择最合适的一个填入问号处,使之呈现一定的规律性:

从所给的四个选择中选择最合适的一个填入问号处,使之呈现一定的规律性:

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Adults' knowledge and mental powers hinder their complete ma

Adults' knowledge and mental powers hinder their complete mastery of a foreign l

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The reporter was accused of unprofessional conduct.

The reporter was accused of unprofessional conduct.

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下列词语,填入[]最恰当的一项是(  )。

下列词语,填入[]最恰当的一项是(  )。

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Since the birth of the Barbie doll it has served as a sign t

Since the birth of the Barbie doll it has served as a sign to show the tendency

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