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 miles per second.
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单项选择题
A．Because of their love for hobbies and pastimes.B．Because of their enthusiasm for sports.C．Because of their fear of heart attacks.D．Because of their strong desire for good health.
A．Because of their love for hobbies and pastimes.
B．Because of their enthusiasm for sports.
C．Because of their fear of heart attacks.
D．Because of their strong desire for good health.
单项选择题
A．He is always in a hurry.B．He is quick in making decisions.C．He is always the first to arrive at the airport.D．He usually doesn’t get the reward he deserves.
A．He is always in a hurry.
B．He is quick in making decisions.
C．He is always the first to arrive at the airport.
D．He usually doesn’t get the reward he deserves.
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