Помогите пожалуйста СРОЧНО... !!!! 

нужно откорректировать предложения и вставить нужное слово...

1) Though I was sitting in the last row, I could see/seeng the film well.
2) I have met/met this man before.
3) He couldn`t find his watch. He has/had lost it.
4) I have been waiting/waited for you for 20 minutes already.
5) Many tourists have visited/visiting that castle.
6) The performance is starting/starts at 7 p.m.
7) I prepared/was preparing for the exam when the telephone rang.
8) I won`t tell/am not telling anyone your secret.
9) Julius Cesar has landed/landed in England in 55 BC.
10) I`ll send you the information when I get/I`ll get it.
11) Sammy was waiting for us when we got/had got of the plane.
12) I don`t like them because they are always complain/complaining.

1) Though I was sitting in the last row, I could see the film well.2) I have met this man before.3) He couldn't find his watch. He had lost it.4) I have been waiting for you for 20 minutes already.5) Many tourists have visited that castle.6) The performance is starting at 7 p.m.7) I was preparing for the exam when the telephone rang.8) I won't tell anyone your secret.9) Julius Cesar landed in England in 55 BC.10) I'll send you the information when I get it.11) Sammy was waiting for us when we got of the plane.12) I don't like them because they are always complaining.