单选题 Ever since Picasso's painting went on exhibit, there ______ large crowds at the museum every day.
  • A. had been
  • B. have been
  • C. has been
  • D. are


【正确答案】 B
【答案解析】[分析] ever since引出时间状语从句时，主句谓语动词一般要用现在完成时。由于主句主语large crowds为复数形式，因此选B。