---How do you go to school every day？---.A. By bikesB. By bikeC. On bikeD. By a bike

问题补充：

---How do you go to school every day？---.

A. By bikes

B. By bike

C. On bike

D. By a bike

答案：

A. By bikes

(答案→)B. By bike

C. On bike

D. By a bike

解析：“骑自行车”可以用by bike或者on a bike。本句的意思是“你每天怎样上学？”“骑自行车。”所以本题选B。