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.

人们通过植树造林能预防或减少的地质灾害是                            (    )