Choosing the appropriate option to fill the gap in the following sentences:
the principal was able to establish a functional language laboratory for school because he acted .... the advice of experts on the subject
The correct answer is D. on
The sentence should read: “The principal was able to establish a functional language laboratory for the school because he acted on the advice of experts on the subject.”
The preposition “on” is used here because it indicates that the principal’s actions were based upon or as a result of the advice of the experts.
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