Finish the second sentences so that it has the similar meaning as a first

Finish the second sentences so that it has the similar meaning as a first
1. The meeting didn't begin until the President came
=> It was not.......................
2. We couldn't swim because the sea was rough
=> Because of.........................
3. He came late so he missed seeing his friend
=> If.......................
4. I didn't study English until I was in grade 6
=> It was not.....................
5. She works very hard so that she can please her parents
=> She works...................
6. He met them at the supermarket last Sunday
=> Thay.................................
7. There are a lot of famous pictures in the gallery.
=> The gallery....................................
8. It a long time since I ate French food
=> I haven't ..........................
9. I had had breakfast with my family then I went to school
=> After........................
10. It is five years since she went to The USA
=> She has.............................