单项选择题

All the nations in the world are supposed to uphold the principles set by the United Nations.

A．inspect
B．incorporate
C．support
D．integrate
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单项选择题
In 1976, a terrible earthquake killed countless people in China. People fear an earth quake will take place again.
A．incur
B．recur
C．occur
D．curb
单项选择题
He flew into a fury when I said I couldn't help him any more.
A．anger
B．pool
C．boat
D．crowd
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