1 - The structure of the restrictions on alien immigration leaves much to the discretion of the officials in charge.

2 - Even though the United States consists of many different immigrant groups, many sociologists believe there is a distinct national character.

3 - By the time newcomers to the United States had passed through the immigration center on Ellis Island, they had been screened for certain contagious diseases.

4 - It is generally felt that members of the white working class in Britain express racist sentiments since they are the people most directly affected by Asian immigration.

5 - A recent surge in immigration rates has led psychologists to study how these families are coping and thriving in their adopted countries.