Difficulty: Easy
Correct Answer: The instructions were being read out by the invigilator.
Explanation:
Concept/Approach
Past continuous passive: "were being + past participle". Retain the particle "out" from the phrasal verb "read out".
Option analysis
Correct: "The instructions were being read out by the invigilator."(a) Simple past passive; loses continuous aspect.(c), (d) Past perfect passive; incorrect tense.
Final Answer
The instructions were being read out by the invigilator.
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