下面短文中有10处错误,每句最多2处错误,请在有错误的地方增加、删除或修改某个单词。

增加：在缺词处加一个漏字符号(∧)，并在其下面加上该加的词。

删除：把多余的词用斜线(\)划掉。

修改：在错的词下划一横线，并在该词下面写上修改后的词。

注意：1.每处错误及其修改仅限一词；

2.只允许修改10处，多者（从11处起）不计分。

Once a man got on a bus for New York. He hid in toilet, because he did not want to pay.  But a passenger saw her. She tapped the person in front of her on the shoulder and say, "There's a  bum(流浪汉) in the toilet. Tell the bus driver."The message was past from person to person. But anywhere along the way, it changed. The bus  driver was told that there was a bomb in the toilet. He immediate stopped the bus and telephoned the police. When the police came in, they told the passengers to get off the bus or stay far away. Then  they closed the highway. This soon caused a 15-miles-long traffic jam. Under the help of a dog, the police searched for two hours. Of course they found no bomb!

2008 年美国总统选举，奥巴马与麦凯．巴展开激烈的角逐。双方就外交政策、金融危机、伊拉克战争等问题进行激烈的辫论，无论谁最终入主白宫，都会对美国未来政局走向产生持久而重要的影响。

结合上述材料，回答下列问题：

（1）美国实行怎样的政党制度，并说明该制度的实质。

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（2）有人认为，美国总统竞选人之所以展开激烈的竞争是因为总统具有“帝王般”的权力，且不受制约。你认为这种观点是否正确并说明理由。

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