假定英語課上老師要求同桌之間交換修改作文，請你修改你同桌寫的以下作文。文中共有10處語言錯誤，每句中最多有兩處。每處錯誤僅涉及一個單詞的增加、刪除或修改。
增加：在缺詞處加一個漏字符號（/\），并在其下面寫出該加的詞。
刪除：把多余的詞用斜線（\）劃掉。
修改：在錯的詞下劃一橫線，并在該詞下面寫出修改后的詞。
注意：
1.每處錯誤及其修改均僅限一詞；
2.只允許修改10處，多者（從第11處起）不計分。
    Last year I went abroad to study as exchange student.While in America，I lived with a host family but learned about the life of common people.I study in a public middle school and took in many courses，including English writing，art，literature and history of western countries.That impresses me most is that our teachers always create a kind of atmosphere that we can voice our opinions freely.During my stay，I visited many places of interests and science museums，get a better understanding of American culture.This is really an enjoyable and forgettable experience for me.I got to know more about the differences between America and China.What's more，my oral English was improved rapid.