寒假作业07 七选五10篇-【寒假分层作业】2024年高二英语寒假培优练（译林版2020）

作业07 七选五10篇 （2023上·江苏常州·高二常州高级中学校考阶段练习）How to Build a Natural Swimming Pool Whether you like to practice your dolphin dives or idle away the day on a raft, swimming is one of summer’s perfect pleasures. With a minimum of materials, you can create a cooling summer retreat in your backyard. Though common in Europe, natural swimming pools, are in their early stage in the United States. You can ask most American swimming-pool contractors (承包商) to build a backyard pool. 1 It may include rebar (钢筋), gunite (压力喷浆), fiberglass, and a filtration (过滤) system. But in recent years, a few builders and a growing number of homeowners have learned how to build pools. 2 They’ve found it’s possible to construct pools that are more about building with nature and blending into the natural landscape. Natural swimming pools use stone and clay in place of concrete or fiberglass, and aquatic plants instead of harmful chemicals and complicated mechanical filtering systems. 3 They also support beneficial bacteria that consume potentially harmful organisms, and give habitat to frogs, dragonflies, and other water life. 4 A natural pool can be built for as little as $2,000 if you do it yourself, while conventional pools can cost tens of thousands of dollars. Natural swimming pools require no harmful chemicals, are fairly low-tech. 5 You won’t have to drain the pool each autumn. Except for topping it off now and then, you’ll fill the pool only once. A．The plants enrich the pool with oxygen. B．Chances are that they will roll out a long list of goods. C．You can make your pool as shallow or as deep as you want. D．And once established, they call for only a bit of management. E．It is the most ecological and economic way to build a conventional pool. F．They don’t rely on a mass of manufactured materials and chemical additives. G．The result is an ecological system that is relatively inexpensive to construct. （2023上·江苏·高二校联考阶段练习）Feeling stuck in a place of hopelessness ma