单选题 Recently he______ every night until after one o' clock, preparing for the final exam.
  • A) shows up
  • B) show off
  • C) stays in
  • D) stays up


【正确答案】 D
【答案解析】[考点] 动词词组词义辨析
[解析] show up意为“揭露，露出，露面”；show off意为“炫耀，显耀”；stay in意为“在家，不外出”；stay up 意为“熬夜，不睡觉”。根据句意，故选D。