单项选择题

People of all countries are expected to ______ the principles of the United Nations and defend the peace in the world.

A．inspect
B．expedited
C．uphold
D．reinstall
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单项选择题
In the past most pilots have been men, but today the number of women this field is climbing.
A．shamming
B．devoting
C．registering
D．pursuing
单项选择题
This teaching method is a ______ of many methods which have been used for decades in the country.
A．symposium
B．symphony
C．spectrogram
D．synthesis
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