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。

    During the National Day holiday, I paid a visit my grandma in the countryside. It has been almost two years since I last saw her. In my memory, my grandma was a hardworking but strong woman full of energy. Whenever she saw me, she always hugged me deep. But when I gave her a hug this time, I found that she was much short and thinner than before. Her back was become bent and her hairs turned white. But luckily, she was still health. She could laugh like a child. To my happy, she could cook some delicious food for me. I love my grandma. I know he will always be there, helping me and loving me.

读我国下列省级行政区轮廓图，四省中，牌照为“鲁A12345”的小轿车所属的省区是

下列句子中，标点符号使用不正确的一项是（     ）

同学在制作简易（直流）电动机的过程中，若要改变电动机的转动方向，可以（）

列式计算

一个数是50的75％，这个数的20％是多少？(结果用小数表示)