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They examined both the samples very carefully but failed to detect any difference in them.

  • A.some difference between
  • B.any difference among
  • C.some difference in
  • D.any difference between

Answer: D

It should read any difference between.

Between is used of two things, among of more than two, and there are two samples. Any is right in a negative context; some would be wrong after failed to detect.

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