【题目】The Italian boy was regarded as a hero ________ he gave his life for his country.
A.why
B.which
C.that
D.because

【答案】D
【解析】句意：这个意大利男孩被视为英雄，因为他把生命献给了祖国。根据语境可知，此处应该填一个引导原因状语从句的连词，故选D。