扫描二维码，直接登录
题库 / Prep2007E2-SC-63
Compared to those who do not, running three days a week saves an average of 14.1 percent on health-care costs each year in the United States.
Compared to those who do not, running three days a week saves
Compared with nonrunners, people who run three days a week save
Compared to not running, those running for three days a week save
When compared with those who do not, people running three days a week save
When compared to nonrunners, running three days a week saves
还没有题目讲解（毕出老师会陆续发布对官方考题的解读，请保持关注）。
DE,when……时，人们节约能源，那不与其他人比较时，这些人就不节约能源了？when用在此处错误。
登录 或 注册 后可以参加讨论