From the words or group of words lettered A to D, choose the word or group of words that best completes each of the following sentences. They ...........the...

From the words or group of words lettered A to D, choose the word or group of words that best completes each of the following sentences.
They ...........the competition when we arrived

Answer Details

The blank space in the sentence indicates a past action that happened before we arrived. Therefore, the correct answer is "had begun." This is because "had begun" is the past perfect tense, which is used to describe an action that was completed before another past action. In this case, the competition had already started before we arrived. For example: "When we arrived at the competition, they had already begun."