改错
下面短文中共有10处错误，每句最多有两处.错误涉及一个单词的增加、删除或修改。
增加：在缺词处加一个漏词符号(∧)，并在此符号下面写出该加的词。
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。
Thank you very much for invite me to your birthday party in Saturday morning. I'd like to
come and I have to go to my hometown to see my grandparents. They were very old and unluckily
they are not in a good health recently. My mother has already made a telephone calling to them
and promised visit them with me this Saturday. My mother said we will stay at m
y grandparents'
the whole weekend. So I'm real sorry I can't attend your party. I do hope you will understand all
this. Here I wish you a lot fun on your birthday and many happy returns of the day.
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