Complete the sentences using the information in the brackets. Use the past perfect in negative sentences. Study the example.1.I saw him because he (not/leave) for work.2.He didn't get the job because he (not/send) all his papers in.3.The dog was really hungry. Mary (not/feed) it since Monday.4.In the shopping centre I met a friend who I (not/see) for ages.5.The thief could walk right into the house because you (not/lock) the door.