Under no circumstances ______ permitted to operate the heavy industrial machinery without certified safety training.
Answer and explanation
Correct answer: A. are employees
- Step 1: Apply negative inversion rule: Sentences beginning with restrictive prepositional phrases like 'Under no circumstances' require subject-auxiliary inversion.
- Step 2: The auxiliary verb 'are' must precede the subject 'employees': 'are employees'.
Answer
are employees.
Why not the others: 'employees are' and 'employees were' fail to invert; 'have employees' uses an incorrect auxiliary for passive voice.
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