-How do you usually go to work, Miss Green?
--I usually go to work foot, but sometimes my bike.
A. on, by
B. on, on
C. by, on
D. by, by
网友回答
A. on, by
(答案→)B. on, on
C. by, on
D. by, by
解析：本题考查介词。on foot 为固定词组搭配，表示步行去某地；on one’s bike 骑自行车。句意：——格林小姐，你通常怎么去工作？——我通常步行去工作，但有时骑我的自行车。