(10) You must ride your bike____the right side of the road.A

(10) You must ride your bike____the right side of the road.A at B on C in D for (13) ----Ben,how
(10) You must ride your bike____the right side of the road.
A at B on C in D for
(13) ----Ben,how did you get to the small town?
-----There was no bus in that town.I had an____
A eight--mile walk
B eight miles walk
C eight mile's walk
D eighth mile walk
请说明选择的理由
B CD