A．Its population consists of people of various nationalities.B．The people tend to gather in racial groups.C．It has always kept its door open to immigrants.D．People all over the world have been to the country.
A．Its population consists of people of various nationalities.
B．The people tend to gather in racial groups.
C．It has always kept its door open to immigrants.
D．People all over the world have been to the country.