单项选择题

A. A kind of exchange. B. A kind of business.
C. A commercialized exchange. D. An international friendship association.
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单项选择题
A. He will write a short paper instead of a long one. B. He hopes to write a paper. C. He doesn’t know which. D. He prefers the tests to the term paper.
A. He will write a short paper instead of a long one. B. He hopes to write a paper.
C. He doesn’t know which. D. He prefers the tests to the term paper.
单项选择题
A. Student and teacher. B. Patient and doctor.C. Waitress and customer. D. Client and lawyer.
A. Student and teacher.
B. Patient and doctor.
C. Waitress and customer.
D. Client and lawyer.
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