From the words lettered A to D, choose the word that best completes each of the following sentences. Only one of the contestants..........able to answer the...

From the words lettered A to D, choose the word that best completes each of the following sentences.
Only one of the contestants..........able to answer the question correctly

Answer Details

The best word to complete the sentence is "was". Explanation: The sentence is in the past tense, and "one" is singular. Therefore, the correct verb form to use is the singular "was". The word "can" is in the present tense and doesn't match the past tense of the sentence, while "are" and "were" are both plural and don't match the singular "one" in the sentence.