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: As they-..............

Answer Details

The correct answer is "were sleeping." The sentence is in the past tense and describes an action that occurred in the past. The phrase "as they" suggests that the action being described is happening at the same time as something else. Therefore, the correct verb tense to use in this sentence is the past continuous tense, which is "were sleeping." This suggests that while the occupants of the house were sleeping, the thieves broke in.