单项选择题

Relations between the two countries have______ since the agreement was signed.

A．deteriorated
B．degraded
C．degenerated
D．decayed
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单项选择题
The conference was attended by both government officials and______ academics.
A．significant
B．dominant
C．magnificent
D．prominent
单项选择题
The Timber rattlesnake is now on the endangered species list, and is extinct in two eastern states in which it once
A．thrived
B．swelled
C．survived
D．flourished
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