文中共有10处语言错误，每句中最多有两处。错误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. 每处错误及其修改仅限一词；
2. 只允许修改10处，多者（从第11处起）不计分。
Dear Mr. Black,
I’m very thank to you for inviting me to stay with you in the come summer vacation. I
have been dreamed of seeing you again so that I can get more help from you in my English
learning. And I’m afraid I cannot go to your place in this summer. I’ve promised my
grandmother, she lives in the country, to spend this summer with her. She misses me too much
that I find difficult to refuse her request. I’m busy with preparing for my examinations at
present. I planned to visit you in winter if it’s convenient to you.
Best wishes,
Yours truly,
Li Ying