根据材料内容，从下面五个选项中选出能填入文中空缺处的最佳选项，使文章意思通顺、内容完整。

Did you ever ride on a camel (骆驼) in the desert (沙漠)? The camel sways (摇摆) when it walks. It feels like a bumpy (颠簸的) boat ride on the sand. 【小题1】

Long ago, people used camels to carry all their things across hot and dry deserts. Camels are really good at traveling in the desert. They eat wild plants and carry more things than horses. When the sky is full of wind and sand, they can still travel. 【小题2】 Sometimes, a camel could carry lots of things and go without water for two weeks. 【小题3】 People drink camel milk and eat camel meat. Dried camel droppings (粪便) are useful, too. 【小题4】 So, next time you think about a desert trip, remember to meet camels. 【小题5】

In the last century, differnet natural disasters have robbed several cultural heritage(遗产) from us. On WeChat, some people say, “What a pity that we cannot see the damaged parts of the wonders anymore.” But people can see them in a new way---through a video game. In this game, the player can travel to one city after another and enter the buildings exactly like they are in reality, and see the wonders as they were before the fire.

Maybe digital technology(数字技术) could help protect cultural heritage better. This idea dates back to the 1990s and the necessary technology has continued to develop since then. By scanning(扫 描) the ancient buildings, building 3D models, as well as measuring everything, engineers can make a copy exactly as the real one.

As computers and smart phones are popular, the digital copy has great value. First, it allows tourists to feel the cultural heritage without touching them, which helps protect them. The virtual tour of Dunhuang Grottoes(敦煌石窟) is a good example of this as tourists can view the paintings without standing near them.

Second, it can make the cultural heritage more famous by spreading information about them through the internet. In 2000, a virtual tour of the Dunhuang Grottoes became very popular at the Hannover World Expo, which increased the number of foreign tourists visiting the site in the following years.

Last, it stores all the information of the cultural heritage. Even if the real ones are damaged one day, people can still know what they were like and can build a new one if wanted. Of course, however exact a model, it is not the real one.

Maybe we will have better technologies in the future, but the digital technology offers a practical way to protect cultural heritage at the moment.