Điền giới từ thích hợp vào chỗ trống: Maryam and Lan have been penpals .... over two years

Điền giới từ:
1. Maryam and Lan have been penpals .... over two years.
2. Maryam was really impressed .... the beauty of the city.
3. Lan used to walk past the mosque ... her way to primary school.
4. It seems very difficult ... me to have a trip aboard.
5. The two cities are the same .... some ways.
6. Malaysia is divided .... two religions, known as West Malaysia and East Malaysia.
7. No one told me ... the change of the plan.
8. My friend was the winner ... the competition.
9. I'm looking forward to hearing ... the competition.
 (   mn giúp mình với ạ. )