单选题 You will improve your life quality a lot if you ______ your bad habits.
  • A. gave up
  • B. give up
  • C. had given up
  • D. will give up
【正确答案】 B
【答案解析】[解析] 根据if连词的用法“主句一般将来时+从句一般现在时”句型，B为正确答案。