A

Từ (1) và (2) ta có :

 (vòng)

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.

12w em