单选题 John played basketball in college and ______ active ever since.
  • A. have extremely been
  • B. has been extremely
  • C. will be extremely
  • D. should extremely be
【正确答案】 B
【答案解析】[解析] 根据时间状语“ever since”，本句应该用现在完成时，表示过去的影响一直持续到现在。答案是B。