单项选择题

Why was the United States called a "melting pot"

A．Most immigrants have settled in big cities.
B．Its population consists of people from various countries.
C．Most people tend to forget where their ancestors came from.
D．People gathered in racial groups.

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热门试题

单项选择题

What happens to students who miss more than four classes

A．They may fail the course.
B．They may not have to make up the work.
C．They may have to do additional assignments.
D．They may not understand the labs.

单项选择题

When does the professor have office hours

A．Mondays.
B．Wednesdays.
C．Fridays.
D．Monday through Friday.