Themomentweheardthenews,webegantosetouttorescuethose

问题详情：

 The moment we heard the news, we began to set out to rescue those _____ in the collapsed mine.

   A. having trapped           B. trapping                  C. trapped          D. to be trapped

【回答】

C

知识点：非谓语动词

题型：选择题