Our car on our way to school so we had to walk there.A. broke upB. broke offC. broke dow

问题补充：

Our car on our way to school, so we had to walk there.

A. broke up

B. broke off

C. broke down

D. broke away

答案：

A. broke up

B. broke off

(答案→)C. broke down

D. broke away

解析：短语辨析。A关系破裂；破碎；解散；B停止，分离；C出故障，分解；D摆脱。句意：我们的汽车在半路上出了故障，所以我们不得不步行去那里。根据句意说明C正确。