I was wondering what to do with my car which won't start a kind man offered to help.A. wh

问题补充：

I was wondering what to do with my car which won start a kind man offered to help.

A. while

B. and

C. so

D. when

答案：

A. while

B. and

C. so

(答案→)D. when

解析：D 考察连词。句义：我当时正想着如何处理我的不能发动的汽车，就在那时，一个好心人帮助了我。根据句义排除BC项，when在这里表示就在那时，相当于at that time。故D正确。