1 . 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。

Pasty Smith has raised ducks for many years. One of her ducks, Peg, losing one of his legs in a fight with a tortoise. Mrs. Smith called for help to see if anyone could create new leg for Peg. Three students thought they would probable use their 3D printer to create a leg for him! They spent several months create and testing different model. It turned out to be a lot more difficult than they had thought! Luckily, their hard work was paid off and they created a model who fitted Peg's leg perfectly! Now, Peg can walk or even run just like her duck partners! And Mrs. Smith is very thankful for them.