228.Every day that they write in their journals puts them a step closer to fluency, eloquence, and command of language.

英语四级译文:
他们每天在写日记，这会让他们表达更加流利和雄辩，距掌握语言更近了一步。

四级词汇讲解:
本句的主干是that puts them 。every day为时间状语;that引导的是主语从句;a step closer to fluency, eloquence, and command of language为宾语them的补语:

command作名词与介词of连用意为“使用或控制某事物，掌握”。如:
He has a good command of English.他精通英语。

英语四级考点归纳:
常见的主语从句有以下几种:

※ 由that引导。如:
That he hasn't called is odd.他没来电话真是很奇怪。
It's certain that prices will go up.物价要上涨是肯定的。

※ 由连接代词或连接副词引导。如:
Why they left wasn't important.他们为什么离开并不重要。
It was uncertain whether she would come or not.她来不来还不确定。

※ 由关系代词what或whatever引导。如:
What I want is a watch.我想要的是一块手表。
Whatever you did was right.你做的一切都是对的。