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。
According to the World Health Organization, 81% of teenagers are lacked in exercise. The result of the survey sounds reasonable. They may seem surprising, though.
Some of us think exercising is a waste of time when having many homework in high school. Others prefer phones to sports. Apart from these reasons, there is even some students who complain that they can't afford sports facilities.
However, doing regular exercises can strengthen our body but make us energetic. It is also beneficial as it helped to remove pressure once in while. Therefore, my fellow friends, remember to stretch out ourselves every day at intervals of studies. More important, do stick with the workout.
As teenagers, we all expect for healthy bodies and a high quality of life. Let's exercise together from then on!
