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Pregunta 30

An unknown event delayed the morning train. Complete the neutral question: ___ delayed the morning train?

  1. What did
  2. Which did it
  3. WhatRespuesta correcta
  4. What it

Explicación

The missing information is the event that caused the delay, making what the grammatical subject. It therefore stands directly before delayed, without did or subject-auxiliary inversion.

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Pregunta 30: An unknown event delayed the morning train. Complete the… · English Questions and Negation · Questena