单选题 Although he was ill, ______ he went on working.
  • [A] but
  • [B] yet
  • [C] and
  • [D] while


【正确答案】 B
【答案解析】[考点] 词语辨析
[解析] A和D尽管有转折的意思，但不能与though/although同时使用。至于C项，则明显不符合句意，予以排除。