From the words or group of words lettered A to D, choose the one that best completes each of the following sentences. To have gone through a civil war.........

Answer Details

The most appropriate word to complete the sentence is "must have been". The sentence implies that experiencing a civil war is a terrible experience and suggests that it is a very strong possibility that someone who has been through such an experience would have suffered a great deal. Therefore, "must have been" which indicates a high degree of certainty is the most suitable option to complete the sentence.