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单项选择题

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A. Customer and assistant. B. Father and daughter.
C. Dentist and patient. D. Teacher and student.
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单项选择题A. Jack survived the accident. B. Jack was the only victim of the accident.C. Jack saved all the other passengers. D. Jack had little damage done to hiscar.

A. Jack survived the accident.
B. Jack was the only victim of the accident.
C. Jack saved all the other passengers.
D. Jack had little damage done to hiscar.

单项选择题A. About 4,000 years ago. B. About 3,000 years ago.C. About 2,000 years ago. D. About 1,000 years ago.

A. About 4,000 years ago.
B. About 3,000 years ago.
C. About 2,000 years ago.
D. About 1,000 years ago.