单选题 Although ______ American literature, he failed to remember the writer of the masterpiece.
  • [A] be was knowing
  • [B] he is knowing
  • [C] knows
  • [D] having a knowledge of


【正确答案】 D
【答案解析】非谓语动词题。know是静态动词，不能用于进行时；选项[C]knows从句中又缺少主语。选项[D]中的 knowledge作“知识”讲时是不可数名词，但作“了解”讲时，前面可加“a”，常用于词组have a knowledge of中，所以选[D]。