1 Mai is my close friend. She is helpful and ready to help others if she is able to.
→ Mai, who is helpful and ready to help others if she is able to, is my close friend
2. The boy was seriously injured. He was taken to hospital.
→ The boy who was taken to hospital was seriously injured
3. We can’t agree with the proposal. It may cause the air pollution.
→ We can’t agree with the proposal which may cause the air pollution.
4. I like the house. It has a white window.
→ I like the house which has a white window.
5. The train didn’t stop at the station near my hometown. I got on that train.
→ The train which I got on didn’t stop at the station near my hometown
6 Professor Wilson is an excellent lecturer. He teaches Chemistry.
→ Professor Wilson, who teaches Chemistry, is an excellent lecturer.
7 . The student writes well. I read her composition.
→ The student who I read composition to writes well
8 . We often visit our friends in Bristol. It’s only 30 miles away.
→ We often visit our friends in Bristol where is only 30 miles away.
9. The village has around 200 people. It is very peaceful.
→ The village which is very peaceful has around 200 people
10. I was born In Hue. There are a lot of mausoleums there.
→ I was born In Hue where has a lot of mausoleums.