9 Answer the questions. Use the correct form of the past perfect. 1 Why was the house so quiet? (everyone / go to bed) . 2 Why did you find the film boring? (1/ see/it/ three times) 3 Why were they nervous on the plane? (they / never / fly/before) 4 Why was the girl crying? (someone / steal/ her bag) 5 Why did he feel so tired? (he/not sleep/ the night / before) 6 Why did they arrive late? (they / miss / the bus) 7 Why didn't you pass your exam? (I / not study/ very much) 8 Why didn't Amy answer her mobile? (her/battery/ run out)