文中共有10处语言错误，错误涉及一个单词的增加、删减或修改。

增加：在缺词处加一个漏词符号（︿），并在其下面写出该加的词。

删除：把多余的词用斜线（＼）划掉。

修改：在错的词下面画一横线，并在该词下面写出修改后的词。

注意：1. 每处错误及其修改均仅限一词；

2. 只允许修改10处，多者（从第11处起）不计分。

How a great party! I seldom go to parties because it’s such a problem to me to remember people names. I’m so glad I’ve read that book about improving your memory. The author suggest do exercises, and they really help. I don’t worry about what people would think me any more, and I try to pay attention to that people are saying. As result, I have a great time! I’m even planning to go on dancing with my friends. I will have an English test tomorrow, so I could stop writing now and start studying.

采用地下水源有何优点？