The area was struck by an o__________ of the epidemic. (爆发)
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It was not right to s_________ themselves like that. (隔绝)
The discovery will help scientists u__________ the mystery of the Ice Age. (阐明)
The social changes which occurred in China are r_______________. (非凡的)
The actress red dress was very c_______________ on the stage. (显眼的)