英语 sailing across the ocean alone was an achieve
问题描述：
英语 sailing across the ocean alone was an achieve
英语 sailing across the ocean alone was an achievement ____took courage.定语从句 那么如何划分句子成分 确定关系词
答
that
作从句主语的关系代词.
翻译：
独自穿过大海是需要极大勇气的壮举.主句是谁？sailing was a achievement?可不可以用which