1/ What do you do if you find a wallet with a lot of money inside?
2/ if Gina types correctly, the postman won't send the package to the wrong address.
3/ how would you solve the problem if you were me?
4/ if the Earth suddenly stop spinning what can be happen to humans?
5/ we  won't have to use cars anymore if everyone can fly
6/ he may be happier if he has more friends in his new school
7/ if I win the lottery, I will travel around Europe for a year.