单项选择题

A. Customer and salesman.
B. Colleagues.
C. Employee and boss.
D. Classmates.
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单项选择题
A. He has never been to Gettysburg. B. He took a political science course. C. His family still goes on vacation together. D. He’s interested in the United States Civil War.
A. He has never been to Gettysburg.
B. He took a political science course.
C. His family still goes on vacation together.
D. He’s interested in the United States Civil War.
单项选择题
A. Keep it waterproof.B. Keep it cool in summer.C. Communicate with other birds of the same species.D. Allow it to fly.
A. Keep it waterproof.
B. Keep it cool in summer.
C. Communicate with other birds of the same species.
D. Allow it to fly.
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