单项选择题

A．In the fourth year of a biology course.
B．In the third year of a biology course.
C．In the second year of a biology course.
D．In the first year of a biology course.
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单项选择题
A．Many foreign tourists visit the United States every year.B．Americans enjoy eating out with their friends.C．The United States is a country of immigrants.D．Americans prefer foreign foods to their own food.
A．Many foreign tourists visit the United States every year.
B．Americans enjoy eating out with their friends.
C．The United States is a country of immigrants.
D．Americans prefer foreign foods to their own food.
单项选择题
A．A person whose parents are clever.B．A person who often thinks about difficult problems.C．A person who is often helped by his parents and teachers.D．A person who is born with a good brain and putting it into active use.
A．A person whose parents are clever.
B．A person who often thinks about difficult problems.
C．A person who is often helped by his parents and teachers.
D．A person who is born with a good brain and putting it into active use.
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