我搞不懂了.It was （ ）journey.A three— hourB a three hou

问题补充：

我搞不懂了.It was （ ）journey.A three— hourB a three hour c a three—hourd three hour

答案：

选C,翻译是:这是个3天的旅程.

three—hour 在这里做形容词,意思是3天的修饰journey,所以前面要加个不定冠词a,

Ps:像three—hour这样的中间有连线的复合的形容词,里面的名词都要用单数