D. circle the correct verb.a.when i introduced sue and tim at my party, they were sure they 1 met / had met before. they 2 finally discovered / had finally discovered they 3 were / had been on the same holiday the year before. b. i was looking for my mobile yesterday morning, but i couldn’t find it. i was sure i 4 didn’t lose / hadn’t lost it, because i 5 saw / had seen it twenty minutes before. then i realized that i 6 left / had left it in my trouser pocket, and i 7 put / had put my trousers in the washing machine! c. last week my neighbor was on holiday. one night i 8 heard / had heard a strange noise in her house. i 9 went / had gone to have a look, and found that someone 10 broke / had broken into the house. luckily, he (or she! ) 11 already left / had already left when i got there, and they 12 didn’t steal / hadn’t stolen much- just the tv.​