From the words lettered A to D, choose the word or group of words that best completes the sentence. If it......rained, I would have completed the work.

From the words lettered A to D, choose the word or group of words that best completes the sentence.
If it......rained, I would have completed the work.

Answer Details

The sentence is a mixed conditional sentence. The word that best completes the sentence is "hadn't". This is because the sentence is talking about a hypothetical situation in the past (it didn't rain) and the result of that situation on a past action (not completing the work). Therefore, the correct structure of the sentence in the third conditional form would be "If it hadn't rained, I would have completed the work".