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  3. In the 1970s, many people became concerned about energy. People in developed

In the 1970s, many people became concerned about energy. People in developed

游客2023-10-20  19
问题     In the 1970s, many people became concerned about energy. People in developed countries had to face up to the fact that they used too much energy, and energy sources weren’t going to last forever. One architect, Michael Reynolds, decided to do something about this. He set out to design homes that were cheaper to build and more energy-efficient. In addition, he wanted to do something about the rubbish problem, and came up with the idea of ’ earthships’.

    Although ’ earthship’ sounds like the name of a boat, an earth-ship is actually a house. However, it is a house with a difference. Earthships are constructed from garbage, and they are built using only 10 percent of the energy needed to build an ordinary house. Moreover, after they are built, earthships use only 10 percent of the energy required to heat, light and cool a regular home.
    One of the big benefits of earthships is that they are made from recycled materials. The main construction material of an earthship is used tires that are filled with dirt. The dirt-filled tires are then laid flat and stacked like bricks. Because tires are round, there is lots of extra space between columns of tires. These spaces are filled with used cardboard. The tires and cardboard form the outside walls of an earthship. The walls between rooms inside don’t need to be as strong, so these walls are made with old cans, bottles and cement. All the walls are then covered and painted. In the end, the house looks just like a typical home.
    Another benefit of an earthship is that it saves energy and natural resources. For example, an earthship uses less water than an ordinary house. Rain water, which is collected on the roof, is used for drinking and bathing. Furthermore, earthships need much less energy than ordinary houses for healing and cooling because they are built partly into the ground. This stops the inside of the house from getting too hot or too cold.
    All of these features make earthships very environmentally friendly. That’s one of the reasons they have caught on throughout the world. Earthships have been built in Bolivia, Australia, Mexico, Japan, Canada, England, Scotland and all over the US. Maybe in the near future, an earthship will be landing near you! [br] In the last paragraph, the phrase which means ’have become popular and fashionable’ is______.
选项
答案 have caught on
解析 (最后一段前两句指出所有以上特点使earthships非常环保，那也是earthships在世界范围内have caught on的原因之一，由此可推断have caught on指“变得流行”。)
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