文中共有10处语言错误，要求你在错误的地方增加、删除或修改某个单词。
增加：在缺词处加上一个漏字符号（∧），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，并在该词下面写上修改后的词；
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11处起）不计分。

例如：It was very nice to get your invitation to spend ∧  weekend with you. Luckily                                            the I was completely free then, so I’ll  to  say “yes”. I’ll arrive in Bristol at around 8 pm in am                                                                 on Friday evening.

 
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 my 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.