题目内容：

假定英语课上老师要求同桌之间交换修改作文，请你修改你同桌写的以下作文。文中共有10处语言错误，每句中最多有两处。每处错误仅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：在错的词下画一横线，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。

On Sunday afternoon, I am reading my favorite book when the doorbell rang. It was a package delivering to Mum. After thanking the courier(快递员), I helped Mum carrying it in. Mum asked me to leave the work to Dad. But I decided to do it myself. Immediately, I opened the package, inside what there were some wooden boards, iron parts, and an instruction manual.

Had read the manual carefully, I began to work. With a screwdriver(螺丝刀), I fixed the frame first, and then put the boards on it piece by piece. After two hour of hard work, a lovely flower shelf appeared at front of my eyes. Mum and I were both pleased and we started putting the potted plants onto them.

When Dad came back, hearing it was I who had assembled the flower shelf, and he gave me a thumbs-up with a broadly smile. At that moment, my feeling of content and pride was beyond description.