Выбрать правильное вариант 1. the burglar had already left/already left by the time the police had got/got there 2.someone had called/called the police before i arrived 3. when i heard, i had run/ran to help 4. i had been sitting/had sat here for 20 minutes before is heard the bang 5. i didn't see the detective because he had left/left when i arrived 6. the burglars had been looking/had looked for something, that's why they turned everything upside down