单元达标检测(二)(word教参)-【优化探究】2021-2022学年新教材高中英语选择性必修第三册配套教参（外研版）

2．可适当增加细节，以使行文连贯。 The Great Wall，which is the longest man­made structure in the world, is listed as one of the most important World Heritage Sites in China. [参考范文] 　　The Great Wall，which is the longest man­made structure in the world, is listed as one of the most important World Heritage Sites in China. The 6,300­kilometer­long wall is one of the wonders with a history of over 2,000.It was difficult to build such a long wall without any modern machines.The Great Wall，the longest man­made structure in the world，is listed as one of the most important world heritage sites in China. However，recent research shows that only about 20 percent of the wall is in shape.We should do all that we can to protect it.Otherwise，it will disappear in the near future. 素养培养 The Great Craftsman Xu Liping Xu Liping，born in 1968, who works on solid fuel of aerospace engine in Academy of Aerospace Solid Propulsion Technology, is a national senior technician①and aerospace special technician. Since 1987, he has been engaged in extremely dangerous aerospace engine solid fuel work. He is thought to have been working in explosives. For nearly 30 years, he is praised as “The great craftsman carving the gunpowder” for his professional attitude, excellent skills and devoted spirit. In addition, he has gained a lot of honor for his contribution. The technology in the work that Xu Liping has been doing is still a tough problem in the world，which cannot be done by machine.【1】Everything in his work relies on② manual work.If there is something wrong with his operation，there will be an instant③ explosion④.“If I fail to cut according to the sta