I’m sure you all enjoyed that trip along the Grand Canyon and the Colorado River. It’s quite amazing, isn’t it? The next sto

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问题     I’m sure you all enjoyed that trip along the Grand Canyon and the Colorado River. It’s quite amazing, isn’t it?
    The next stop on our tour is the Petrified(石化) Forest. This is a huge desert forest that is not exactly made of trees. You see, the trees are so old that they have fallen and have turned to stone. They look just like fallen logs, but they are no longer made of wood. Instead they are made of beautifully colored stone. It’s unbelievable to see all of these fallen trees from a distance and then up close see that they are really stone and not wood.
    When we arrive at the Petrified Forest, please be sure to keep in mind that it is against the law to take any petrified wood out of the forest with you. You may think about picking up just a tiny little piece, but please don’t do it.

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答案A tourist/tour guide

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