单选题 Stressful environment leads to unhealthy behaviors such as poor eating habits, which ______ increase the risk of high blood pressure and heart disease.
  • A. in turn
  • B. by chance
  • C. by fortune
  • D. in case
【正确答案】 A
【答案解析】A项in turn“依次，轮流”。B项by chance“偶然地”；C项by fortune“幸而”；D项in case“以防万一”，根据题意，应选A。