The Timber rattlesnake is now on the endangered species list, and is extinct in two

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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 prospered D flourished

参考答案:

A选[A]。所给四个选项中除了[B]swelled,其他三项都表示"繁荣,旺盛"的意思,但[A]thrived多用来指动、植物的繁荣与昌盛;[C]prospered多用来指经济主面的繁荣;[D]flourished多用来指植物的茂盛。