Find and correct the mistakes: I started to follow a diet two month ago. She had toothache because she ate a lot of candies

Find and correct the mistakes
1. I started to follow a diet two month ago
2. She had toothache because she ate a lot of candies
3. Julia lives in New York and so do Mark
4. You should drink a lot of water in a day
5. Where do you and Lausai go for your last holiday
6. We didn't have many money so we stayed in a cheap hotel
7. They went Rome, then thay went around the city