假定英语课上老师要求同桌之间交换修改作文，请你修改你同桌系的以下作文。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：在缺词处加一个漏词符号（∧），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。

My soccer coach retired in last week. I wanted to do anything special for him at his retirement party.  ____  ____

My mum makes the better biscuits in the world, so I decide to ask her for help.  ____  ____

Mum taught me  some basic step of baking. I insisted on doing most of the baking myself. ____

I  thought the biscuits were really well. ____

My only mistake was that I dropped  some on the floor after I was packing them up.    ____
 At a party, my coach, with a biscuit in his mouth, asked surprisingly  who made them and joked,  ____

“I might have to retire again next year just get some more of these biscuits.”  ____
My favorite picture at the party is of my coach and me enjoy the biscuits with happy laughter! ____