Bonjour j'aurais vraiment besoin qu'on m'aide ou qu'on m'explique pour cette exercice en anglais s'il vous plait

COULD & WOULD - EXERCISE
Fill in the sentences with would/could/wouldn't/couldn't

1) If I was sick this winter, you ...... help me with my lessons.
2) If we were lucky, we ....... win the lottery
3) If Diana couldn't go out tonight, her parents ...... take us to the party.
4) If it was raining, she ..... come back by bike.
5) If my parents became rich, we ..... travel all over the world.
6) If I was a good student I ...... succeed brilliantly in my exam.
7) If the lights turned red, the drivers ...... stop.
8) What ...... you do if you won the lottery?
9) You ....... exercise more if you wanted to lose weight.
10) You ....... eat all these cakes if you wanted to lose weight.
11) I ....... buy a car if I had enough money.
12)I ...... do that to him if he was my best friend.