Complete the sentences with the correct preposition.
1. After discussing where to go for about an hour, we ended _____ staying at home.
2. If you want to lose weight, you should stick ______ this diet.
3. The doctor told Frank to cut _______ on fat if he wanted to avoid heart disease.
4. Natalie has completely cut meat ______ of her diet, because she wants to become a vegetarian.
5. The nutritional consultant pointed ______ the advantages of eating lots of green vegetables.
6. The authorities are looking _______ the problem of traffic congestion.
7. You have to speed ______ if you want to finish your work before 5 o'clock.
8. I think they should close _______ the factory on the outskirts of our town because it is causing a great deal of pollution.