1/ If Oanh had known how to solve the math problem, she wouldn't have gotten low marks.
2/ If you had said sorry, she wouldn't have gotten angry.
3/ If they had passed the exam, their family would be happy.
4/ If it hadn't rained a lot yesterday evening, we would have gone swimming.
5/ If the weather had been fine enough, I would have gone camping.
6/ If the computer hadn't broken down, she wouldn't have had to stop her work.
7/ If Thanh hadn't been angry, we would have said something to her.
8/ If our teacher had come, we wouldn't have canceled the party.
9/ If Quang hadn't been interested in the film, he would study his lesson.
10/ If I hadn't had a headache yesterday, I would have gone to school.
