Themomentweheardthenews,webegantosetouttorescuethose

問題詳情：

 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

知識點：非謂語動詞

題型：選擇題