16Hit1600
Standard English ConventionsHardCorrelative conjunctions in parallel

Standard English Conventions practice question

The new scheduling system not only reduced costs ____ improved reliability.

Which choice completes the text so that it conforms to the conventions of Standard English?

  1. A. but alsoCorrect
  2. B. and also
  3. C. however it
  4. D. as well as

Answer: A. but also

'Not only' is paired with 'but also'. The two halves — 'reduced costs' and 'improved reliability' — are then parallel.

Why the other answers are wrong

B. and also
'not only ... and also' isn't a standard pair. 'Not only' expects 'but also'.
C. however it
'however' signals contrast, but improving reliability doesn't contrast with reducing costs — and 'it' breaks the parallel structure.
D. as well as
'not only ... as well as' isn't a pair, and 'as well as improved' doesn't fit grammatically.

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