Исправьте:
1. American old citizens took part in the meeting.
2.This is a shelter for homeless peopel.
3. She is a stewardess.
4.This is a school for retarded children.
5. If a men wants to study at our college, he should odey our laws.

* Я не знаю, как полит корректно называть бездомных, эти два варианта взяты из сети. У ТС все эти слова и выражения должны быть в учебнике, т к я этого учебника не видел, то сделал что мог.

1. Old American  citizens took part in the meeting. ( прилагательные поменяли местами)2.This is a shelter for homeless peopel. - PEOPLE3. She is a stewardess. - все правильно4.This is a school for retarded children. - все правильно5. If a men wants to study at our college, he should odey our laws. - MAN, OBEY

1. American senior citizens took part in the meeting.

2. This is a home for people experiencing homelessness (OR a location for persons who may or may not be experiencing crisis circumstances)*

3. She is a flight attendant (OR an air hostess)

4. This is a school for children with learning disabilities (OR learning difficulties; OR who are intellectually challenged)

5. If a person (OR If anyone) wants to study at our college, they should obey our laws.