单项选择题

Which of the following is NOT mentioned as an advantage of Quiekwheel

A．It can be used on almost any type of vehicles.
B．It is safe.
C．It can be fixed quickly and easily.
D．It is inexpensive.
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填空题
It has been revealed that_________(有些政府官员滥用他们的权力和职位) to get illegal profits for themselves.
单项选择题
Which of the following can be inferred from the passage
A．One should always be positive about invitations.
B．One should accept invitations at all costs.
C．One's presence is a way to show his emotion.
D．One's presence can mean a lot to others spiritually.
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