单项选择题

Benjamin Franklin flew a kite in 1752 in order to ______.

A．send messages far away
B．build an airplane
C．study weather
D．do an experiment
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单项选择题
The following are good advice except ______.
A．dressing properly
B．asking what you don't know
C．offering coffee for others
D．inviting colleagues for dinner
单项选择题
The original kites were used ______.
A．as a way to have a fun
B．as a signal
C．in religious ceremonies
D．as tools for study weather
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