C．giving an example D．making a summary

　　解析：选A　推理判断题。分析文章第一段可知，作者首先对这款可以折叠的机器人进行了描述，通过此种方法引出文章的话题。

　　2．The robot could be used to ________.

　　A．make paper origami art

　　B．make toys for children

　　C．do housework for humans

　　D．search for survivors in an earthquake

　　解析：选D　推理判断题。分析文章第二段可知，在废墟中搜救是这款机器人的功能之一。

　　3．Felton mentions a Word document to show that ______.

　　A．the robot contains a Word document

　　B．the robot can be used by common people

　　C．the robot is easy to reprint

　　D．the robot is in a digital form

　　解析：选C　推理判断题。分析文章第三段，这款机器人的研发者通过word文档很容易改动来类比这款机器人可以很容易复制。

　　4．Which of the following is TRUE about the robot?

　　A．It has been put into wide use.

　　B．It doesn't cost much to make it.

　　C．It is shaped like a crab.

　　D．It is made of rare materials.

　　解析：选B　细节理解题。从文章第四段可知，这款机器人所使用的材料很便宜，因此不需要花很多钱就可以制作这款机器人。

　　B

　　Based on new analysis, we are rapidly approaching major climate change and the effects on society and the environment could be quite severe. Geographers predict that within the next eighty years, current world climate zones could shift and some could completely disappear. Polar regions will get colder while tropical regions will get even hotter, forcing animals to migrate (迁徙) north.

Climate changes like these could lead to the spread of diseases. Tropical storms and