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。

Today was my father's birthday, so I decided to bake a cake for him. I didn't know how make a cake. I couldn't tell my father because of I wanted to give him a surprise. It was my firstly attempt, so I searched on the Internet and found much videos there. I choose the best one. I saw the full videos and started baking. First I collected all the things which might be needed to bake a cake. And then, I followed the steps and finally my cake was ready. Last, I decorated the cake by chocolates so that it looked more delicious. Then I gave the cake to his father and he was really surprising.