要求：如无错误，在该行右边横线上划一个勾（√）；
如有错误（每行只有一个错误），则按下列情况改正：
1. 该行多一个词：把多余的词用斜线（\）划掉，在该行右边横线上写出该词，并也用斜线划掉。
2. 该行缺一个词：在缺词处加一个漏字符号（∧），在该行右边横线上写出该加的词。
3.该行错一个词：在错的词下划一横线，在该行右边横线上写出改正后的词。
注意：原行没有错的不要改。
Dear Xiao Qiang,
Thank you very much for invite me to go and stay with

you in Suining. It’s a most beautiful cities,  and I have been

eager to see you again.  So I’m very sorry to tell you that I can’t

go this winter vacation,  since I’ve already been promised

to stay with my grandmother in the countryside. She was

already 80 years old and misses me so much I have no choice

but to do it. I’m busy preparing to my module exams

all this days, and I feel quite sure of myself. I wish I could go

and see you at the end this year.

Best wishes to you!

Yours sincerely,
Song Jia