1 If she knew any one in London, she woud live there
2 If I had a spare ticket, I could take you to the concert
3 If the children hadn't forgot to water the seeds, they would have grown
4 If they understood the problem, they would find a solution
5 If Carol hadn't been studying, she would have answered the phone
6 If Rita had got some sleep last night, she wouldn't be exhausted today
7 If he could park near his office, he would come by car
8 If the flats were clearly nuumbered, it wouldn't be difficult to find anyone
9 If I knew her e-mail address, I could tell you
10 If she didn't work in the evening, she would have time to play with the children
11 If he saw the signal, he would stop his car
12 If Peter prepared his lessons well, he wouldn'e get bad mark
13 If Mary had enough money, she could buy a new car