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。
Nobody could have failed to notice the fact that drunk driving has become a grave problem what we are faced with. Reports are often heard about deaths result from drunk driving.
A number of factor might have led to this problem. First, Chinese have the custom of urging guests to drink more and regard them as a sign of hospitality. Secondly, the boom of Chinese economy in the past decades brought along a sharp increase in the number of private cars. Lastly, laws and regulations were not severely enough in the past.
For our relief, relevant laws and regulations have been put into the effect to punish those who drives after drinking. And more can be done to avoid drunk driving until things get worse.
