单选题 John seldom went to the laboratory, ______?
  • A. didn't he
  • B. did he
  • C. does he
  • D. doesn't he
【正确答案】 B
【答案解析】[解析] 本题考查反义疑问句的用法。陈述部句分含有否定副词seldom，疑问句部分用肯定。