问题补充：
our food running out, we had to walk to a village for help.
A. As
B. Since
C. With
D. Because
答案：
A. As
B. Since
(答案→)C. With
D. Because
解析：考查with复合结构：ABD都是连词，后面跟着的必须是一个句子，而 our food running out 是一个短语，而不是一个句子，所以用with，句意:由于我们的食物用光了，所以我们需要去村庄里寻求帮忙。选C.
