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。

    I as well as my family are going to New York City this weekend. I had been looking forward to go there for a long time. It is one of the modernist city in the world. There have also a lot of museums where you can learn something you can't learn it in school. I'd also like to see the Statue of Liberty and the Empire State Building. Fortunately, the twin towers destroyed on September 11th, 2001 or I would have the chance to see them by myself. Now I am getting ready for the excited trip. I bet it will be a unforgettable experience.

名著阅读。

甲、乙、丙、丁四名同学经常为集体做好事，星期天，他们当中有一人把操场打扫得干干净净，事后老师问四人，是谁做的好事：

甲说：“扫地的人在乙、丙、丁之中．”乙说：“我没有扫，是丙扫的．”

丙说：“扫地的人在甲、乙之中．”丁说：“乙说的是真的．”

如果知道他们四人中有两个人说的是真话，请问是谁做的好事？（　　）