1. Neil Armstrong was the first man who walked on the moon  2. I come from a city that is located in the southern part of the country.  3. The children who attend that school receive a good education.  4. The scientists who are researching the causes of cancer are making progress.  5. They live in a house that was built in 

1 neli armstrong was the first man who walked on the moon

-> neli armstrong was the first man to walk on the moon

2 I come from a city that is located in the southen part of the country.

-> I come from a city located in the southen part of the country

3 the childen who attend that school receive a good education.

-> the childen attending that school receive a good education

4 the scienntists who are researching the causes of cancer are making progress.

-> the scienntists researching the causes of cancer are making progress

5 they live in a house that was built in

-> they live in a house built in