单项选择题

A. A vacation trip to Yellowstone Park.
B. A lecture by a visiting professor.
C. Her biology thesis.
D. A research project.
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单项选择题
A. Try to get a seat next to the window.B. Find another passenger going to Cleveland.C. Ask for information about the departure time.D. Find out if there are any seats left on the bus.
A. Try to get a seat next to the window.
B. Find another passenger going to Cleveland.
C. Ask for information about the departure time.
D. Find out if there are any seats left on the bus.
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