单选题 The color and smell of water in these rivers ______ itself how serious the pollution is but many people are still ignoring he fact.
  • A.illustrates
  • B.demonstrates
  • C.manifests
  • D.exemplifies
【正确答案】 C
【答案解析】[解析] 各项的意思是：illustrate“给……加插图；说明，阐明”；demonstrate“举行示威游行(或集会)”，manifest“显现，显露”；exemplify“是……的典型；举例证明”。根据句意判断，答案为C。