语法与词汇 8.The timber rattlesnake is now on the endangered species list, and is extinct in two eastern states in which it once______.
【正确答案】 A
【答案解析】A项thrived意为“兴旺;茁壮成长”;B项swelled意为“膨胀,肿胀”;C项prospered意为“发达”;D项flourished意为“茂盛;盛行”。