Period 1 Reading A（同步课件+分层练习）英语沪外版2020选择性必修第一册

Unit 2 Reading A习题检测 一、选用适当的单词或短语补全短文 Directions: Fill in each blank with a proper word chosen from the box. Each word can be used only once. Note that there is one word more than you need. A．alarming         B．constructions         C． revealed         D．invasive         E. rescue F. critical           G. households           H. document         I. concerned       J. amateur K. campaigns Before science became professionalized in the 19th century, 1 naturalists were collecting information and helping us understand the natural world. A 2009 study found that nearly 50% of the UK 2 feed wild birds. The National Trust has more than 5 million members, and 60,000 active volunteers helping to protect the countryside as well as historic 3 . Now, with our environment arguably under greater threat than ever and species declining at a(n) 4 rate, volunteers are once again at the forefront of efforts to limit the damage. Volunteers can be powerful drivers for big changes. On the Isle of Man, more than 8,000 people(nearly 10% of the population)are involved in regular weekend beach cleans. At one recent event, 123 volunteers turned up and removed 183 bags of litter in just a couple of hours. Thanks to 5 such as this, the island shares UNESCO biosphere reserve status with the Galapagos, Yellowstone in the US, Uluru in Australia, and hundreds of other sites. Recreational divers are making a real difference underwater, too. They monitor the spread of 6 species, and record how native species respond. Divers also 7 levels of marine litter and other human impacts. Volunteers have also made a vital contribution to the conservation of basking sharks. The work of a citizen science Basking Shark Project in the 1980s and 1990s was 8 in getting these sharks on the protected species list in the UK, while satellite tagging 9 the first recorded trans-Atlantic crossing by a basking shark. Actually, no one can know better,