We walked as fast as we could to catch the 9:30 train.A. hopingB. to hopeC. we hopedD. b

问题补充：

We walked as fast as we could, to catch the 9:30 train.

A. hoping

B. to hope

C. we hoped

D. being hoped

答案：

(答案→)A. hoping

B. to hope

C. we hoped

D. being hoped

解析：考查现在分词做状语，句意：我们尽可能快的走，希望赶上9点半的火车。是现在分词做伴随状语。选A。