Unit1.Road to Success单元素养评估测试卷-高一英语下学期同步精品课堂（上外版2020必修第三册）

Unit 1 Road to Success 单元素养评估测试卷 第I卷 I. Listening Comprehension II. Grammar and Vocabulary Section A Directions: After reading the passage below, fill in the blanks to make the passage coherent and grammatically correct. For the blanks with a given word, fill in each blank with the proper form of the given word; for the other blanks, use one word that best fits each blank. Over-dried Earth The south-west of the United States, together with some parts of Mexico across the Rio Grande, is one of the driest parts of the North American continent. But, over the past two decades, even that expected dryness ___21___ (take) to the limit. According to Park Williams, who works at Columbia University’s Lamont-Doherty Earth Observatory, the current lack of rainfall in the area constitutes a megadrought of a severity ___22___(see) on only four other occasions in the past 1,200 years. Dr Williams studies the annual growth rings of 1,586 ancient trees, in order to reconstruct soil-moisture patterns going back to 800 A.D. During warm, wet years trees grow fast, producing wide rings. During cold, dry ___23___ they grow more slowly, producing narrow rings. During a drought, a tree ___24___ not grow much at all. ___25___they describe in this week’s Science, the team identified dozens of droughts over the centuries in question. But four stood out. They then took the average soil-moisture value for the current drought and compared it with sequential（连续的） 19-year averages with the previous four, one of them ___26___(last) nearly a century. This showed that the region is already drier than it was during the first three of the previous megadroughts, and is equivalent to the event of 1575-1603. In a world ___27___ human actions are driving temperatures up, Dr Parker and his colleagues wondered how much people are ___28___(blame) for this state of affairs. To estimate that, they turned to climate modelling. Climate models are able to re-run the past with and ___29___ the warming effect