Correct the mistakes where necessary. If you think there's no mistake, click Enter or 1 Peter (had cycled) for about an hour when a thunderstorm (was starting) 2(Do you like) the concert which you (see) last week? 3 My father was absolutely exhausted the other day. He (had working) for almost 12 hours! 4 When Lily (arrived) at school, she realised that she (forgot) an important school project at h