With the gas they had to quit the car and walked.A. ran outB. running outC. run out ofD.

问题补充：

With the gas , they had to quit the car and walked.

A. ran out

B. running out

C. run out of

D. was run out of

答案：

A. ran out

(答案→)B. running out

C. run out of

D. was run out of

解析：with短语常表示伴随，本题中前半句并非是个完整的句子，run out耗尽，不及物动词，无被动形式，后不接宾语，run out of后必须接宾语，句意：因为汽油的耗尽，他们不得不弃车而徒步前进。故选B.