When the news came the war broke out he decided to serve in the army.A. sinceB. whichC.

问题补充：

When the news came the war broke out , he decided to serve in the army.

A. since

B. which

C. that

D. because

答案：

A. since

B. which

(答案→)C. that

D. because

解析：考查同位语从句。消息就是战争爆发了。从句与the news之间是解释说明的关系。故选C。