All workers must be equipped with safety devices such as ...

[ Conjunctions - Conjunctive Adverbs ]

All workers must be equipped with safety devices such as helmets ____ entering the construction site.

A. about

B. during

C. from

D. before

Select your answer:

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The First Conditional (if/unless)Grammar - could / could not Conditionals III - Mixed 1st, 2nd & 3rd Conditionals Grammar - help/have/let/make Compound Sentences Conjunctions - Connectors Present Simple or Present Continuous Conjunctions and Transitions Reported speech (statements)

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a. some

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