单项选择题

A．About 80 miles per second.
B．About 70 miles per second.
C．About 18 miles per second.
D．About 17 miler per second.
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单项选择题
A．An art museum.B．A beautiful park.C．A college campus.D．An architectural exhibition.
A．An art museum.
B．A beautiful park.
C．A college campus.
D．An architectural exhibition.
单项选择题
A．She describes them as grateful students.B．She describes them as brains.C．She describes them as successful students.D．She describes them as fun people.
A．She describes them as grateful students.
B．She describes them as brains.
C．She describes them as successful students.
D．She describes them as fun people.
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