单项选择题

A．They are cheaper.
B．They do not pollute.
C．They are simpler to drive.
D．They are faster.
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单项选择题
A．She has another meeting. B．She feels the grade is all right. C．She thinks it would be wrong to change the grade. D．She can meet with the student that afternoon.
A．She has another meeting.
B．She feels the grade is all right.
C．She thinks it would be wrong to change the grade.
D．She can meet with the student that afternoon.
单项选择题
A．To show a videotape on survival in outer space. B．To gain support for the space program. C．To describe her experience on space missions. D．To inform the audience about the space suit.
A．To show a videotape on survival in outer space.
B．To gain support for the space program.
C．To describe her experience on space missions.
D．To inform the audience about the space suit.
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