英语语法大师分析－－－两个that的用法!
Dictionaries may, however, have social importance. It is often a matter of some concern to the person using the dictionary
[that]
he should not suggest to others, by misspelling a word in a letter, or mispronouncing it in conversation,
[that]
he is not educated.
参考答案:It is .....that....,that....。
这里的It是形式主语，而两个that后面的是真正主语。
对于使用字典的人来说，他不能请教别人，以及他文化水平不高，是比较大的问题。