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 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.

已知反应：H₂(g) ＋ O₂(g) ＝ H₂O(g)     △H₁

N₂(g) ＋ O₂(g) ＝ NO₂ (g)      △H₂

N₂(g) ＋ H₂(g) ＝ NH₃ (g)     △H₃

则反应2NH₃ (g) ＋O₂(g) ＝2NO₂ (g) ＋3H₂O(g) 的△H＝

A．2△H₁＋2△H₂—2△H₃

B．△H₁＋△H₂—△H₃

C．3△H₁＋2△H₂＋2△H₃

D．3△H₁＋2△H₂—2△H₃