1) Would you attack the hijackers if you were on hijacked plane?
2) If they were on a hijacked plane, they would stay calm and would probably survive.
3) If my friend had been trying harder, he would have succeeded.
4) If I had lived in 1703, I shouldn`t (wouldn`t) have had a computer.
5) If she smelt smoke in the middle of the night, she would telephone the fire brigade and run into the street and shout, "Fire!"
6) If he had been invited, he would have come to the party last Sunday.
7) If the driver in front hadn't stopped suddenly, the accident wouldn't have happened.
8) If you don't know how to play, my sister will explain the rules to you.
9) If she had told them it was her birthday, they would have given her a bithday present.
2.were
3.was discovered
4.is visited
5.are
6.is
1.was taken
2.were drawn
3.were built
4.are found
5.is it cleaned
6.was not bought