cycling is a fantastic way to burn a few calories and save some money, there still exist risks.
A. Since B. While C. As D. When
cycling is a fantastic way to burn a few calories and save some money, there still exist risks.
A. Since B. While C. As D. When
B。考查状语从句的连接词。since自从; while尽管; as因为; when当……的时候。句意: 尽管骑自行车是燃烧热量的奇妙的方法, 但也存在风险。根据句意选B。