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。错误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。

Throughout history man has changed their physical environment in order to improve his way of life. With the tools of technology that he has changed many physical features of the earth. Thus, man’s change to the physical environment have not always had beneficial results. Today, pollution of the air and water is a increasing danger to the health of the planet. Like we know, massive destruction of environment has brought in negative effects and even poses a great threat to man’s existence. Therefore, effective measures should be taken and laws pass to conserve environment. Otherwise, man is certain to suffer the serious consequences causing by this lack of care for his living surroundings.