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Police can easily recognize your fingerprints by machine,because every person's fingerprints are ________.

A.outstanding  B.regular

C.ordinary  D.unique

D 句意:警察借助机器能轻易识别你的指纹,因为每个人的指纹都很独特(unique)。outstanding突出的,杰出的;regular有规律的;ordinary普通的。

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B

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(Weren’t they supposed to be on holiday?)

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