单项选择题

That was an era when many Americans felt it was their ______ duty to support the war.

A．authentic
B．ethnic
C．eccentric
D．patriotic
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单项选择题
The experts reached ______ about the causes of global warming in the international conference.
A．consensus
B．pledge
C．commitment
D．racket
单项选择题
On seeing the anxiety of the parents, the doctor ______ them about their son's minor operation.
A．refreshed
B．reproached
C．reassured
D．revived
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