СРОООООЧНОООООООО!!!!!!!!!!!!!!! 
Помогите, открыть скобки и вставить нужное время. I (to write) to you because i hope that you will help me.If you (to answer) my letter as soon as you can i (to be) grateful to you. A strange thing (to happen) to me yerstaday. You of course know my friend George. He (to move) to a new flat recently. We (to meet) in 1987 and (to be) friends ever since. I (to invite) to his housewarming party a few days ago. The thing is that when i (to speak) to him on the phone, the doorbell (to ring). I (to hang) up and when I returned, the paper with his address on it (to disappear).

.If you (to answer) my letter as soon as you can i (to be) grateful to you. A strange thing (to happen) to me yerstaday. You of course know my friend George. He (to move) to a new flat recently. We (to meet) in 1987 and (to be) friends ever since. I (to invite) to his housewarming party a few days ago. The thing is that when i (to speak) to him on the phone, the doorbell (to ring). I (to hang) up and when I returned, the paper with his address on it (to disappear).