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。
Many people who smoke say that smoking helps them think better. Therefore, I am afraid I cannot agree them. I am strong against smoking. First, smoking is bad for one's healthy. People who smoke often develop or even die of different diseases. Second, smoking polluted the air. People cannot work or study well in a room be full of smoke. Third, smoking wastes money. Every year, million of dollars are spent treat diseases caused by smoking. What we can see, smoking does more harm than good and students should not pick out the habit.
