– Why did you come to work on foot this morning? Because today is the day with no cars

问题补充：

– Why did you come to work on foot this morning?

-- Because today is the day with no cars, I my car at home.

A. forgot

B. forget

C. leave

D. left

答案：

A. forgot

B. forget

C. leave

(答案→)D. left

解析：句意：你为什么今天早上步行来上班呢？因为今天是无车日，我把我的车留在家里了。Leave sth spl把某物忘（留）在某处，所以选D。