假定英语课上老师要求同桌之间交换修改作文，请你修改你同桌写的以下作文。文中共有10处语言错误，每句中最多有两处。每处错误仅涉及一个单词的增加、删除或修改。
增加：在缺词处加一个漏字符号（∧），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：在错的词下划一横线，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。
Our school photography club is going to held an International High School Student Photography Show.
As far as I know, the theme of the show is environmental protection. Actually, I know you are gifted in take good pictures and had always wanted to do something for environmental protection. I clearly remember you showed me some photo on that theme the last time when you visited our school. Beside, it will start on June 15th and last three weeks. What makes me exciting is that any student whom is interested can participate in it. In word, I firmly believe this is surely a good chance for more people to see them. If you want to join, send my photos to photoshow@126.com.
Looking forward to hearing from you soon.
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是实数，则实数b的值为（ ）