单选题 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. prospered
  • D. flourished
【正确答案】 A
【答案解析】[解析] thrived意为“兴旺；茁壮成长”。B．swelled意为“膨胀，肿胀”；C．prospered意为“发达”；D．flourished意为“茂盛；盛行”。