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。

We receive your application last week. We regret to inform you that our company has hired a boy calling Tonny the job of the manager assistant. Having studied your certificate careful, we decided that we should hire someone with more office experiences for this particular position. You have impressed them with your desire to learn and your ability to work hard, but we do hope that you will apply for a position in our company sometime in the future. We would like to thank you on your being interested in our company. Please contact us as if there is further questions.

到目前，类风湿性关节炎的病因被认为是（）

A.感染

B.家族遗传

C.免疫功能紊乱

D.风、湿、冷等环境影响

E.目前仍不明