From the words or group of words lettered A to D, choose the word or group of words that best completes the sentence below. One of the clever pupils .....ab...

Answer Details

The correct answer is "was." The sentence is in the past tense and requires a singular subject to agree with the singular verb "was." "Can" is incorrect because it is present tense and doesn't agree with the past tense of the sentence. "Were" is also incorrect because it is plural and doesn't agree with the singular subject "One." "Are" is also incorrect because it is present tense and doesn't agree with the past tense of the sentence.