When the news came the war broke out, he decided, to serve in the army.
A. since
B. which
C. that
D. because
网友回答
A. since
B. which
(答案→)C. that
D. because
解析：考查同位语从句，he war broke out是对news的解释说明，根据句子意思“当战争爆发的消息传来，他决定去部队服役。因此选C。since既然；which表示物的关系词；because 因为。