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1、十五Unit 5Developing ideas. 单词拼写1. She now has authority(权力) over the people who used to be her bosses. 2. The story has all the elements(要素) of a soap opera. 3. She was walking along a path(小径) when she saw the little dog. 4. This becomes the source(来源) of truth for your application. 5. If you get in
2、to trouble, please press the red button(按钮) at once. 6. This tool can be used in a variety(多样化) of ways. 7. His public image (形象) is different from the real person. 8. The scientists will study the variety of trees in the wild and observe (观察) which are fruiting. 9. I had an encounter(邂逅) with my de
3、skmate in the street the other day. 10. I am deeply attracted by the photographs taken by the famous photographer (摄影师). . 单句语法填空1. She enjoys listening (listen) to music in her spare time. 2. I decided to concentrate all my efforts on finding somewhere to live. 3. It is my deskmate who/that helped
4、me with my written English in his spare time. 4. With prices going (go) up so fast, we cant afford luxuries. 5. Despite the approach of winter, the sun shone brightly. 6. While visiting the lake, we took many photos of it. 7. Staring directly at me, she didnt say anything about it. 8. A car ran by m
5、e at a high speed of about 120 km/h. 9. He is in hospital, recovering from a heart attack. 10. I dont know why youre so concernedit isnt your problem after all. . 完成句子1. Our city has a variety of(各种各样的)good shops and supermarkets. 2. The car went at a speed of(以速度)100 kilometers an hour. 3. I am lea
6、ving to concentrate on writing(专心写作). 4. In the West people think its rude to stare at a person(盯着人看). 5. After all(终究), you are a student now, and you should study hard. 6. The place is famous for its hot spring(以温泉而闻名). 7. I think Ill brave the elements(不顾天气恶劣) and take the dog for a walk. 8. Slow
7、ly I began to recover from my earlier depression(从自己以前的抑郁中走出来). . 阅读理解ABees may soon need to add protein shakes to their diet. Pollen (花粉) normally provides their protein (蛋白质). But rising levels of carbon dioxide (CO2) in the air have reduced the protein in pollen. Thats what a new study finds. Sci
8、entists compared recently collected flowers from Canada goldenrod. Then they compared pollen in them to pollen in goldenrod reserved at a museum in Washington DC. They found todays plants have less protein. Protein levels in pollen from the older flowers were 18 percent. Todays goldenrod pollen has
9、only about 12 percent protein. Thats about one-third less than 172 years ago. Over that same period, CO2 levels have gone up by more than one-third. Back more than 170 years ago, they were about 280 parts per million in air. Today they are about 398 ppm. To test whether CO2 changes had played a role
10、 in the falling protein levels, the researchers did some tests. They grew goldenrod for two years at CO2 levels of up to 500 ppm. More CO2 in the air led to lower levels of protein in the flowers pollen. Joan Edwards, one of the researchers, says that this drop in pollen protein could affect a bees
11、diet and health. It would be like eating junk food, tasting good but offering less nutrition (营养). Honeybees need to eat lots of protein. They use it to feed their young. They also need it to keep their immune systems healthy, says Cdric Alaux, a bee biologist at the French agricultural research age
12、ncy. Bee populations have been decreasing worldwide in recent years. A drop in their food quality might play a role, Edwards says. And that drop might affect crops too. “The health of the bee population is not just for the flowers and the bees and biodiversity. ” She worries it also could play a rol
13、e in “human health and well-being”. 【文章大意】这是一篇说明文。一项新的研究发现, 空气中二氧化碳含量的上升降低了花粉中的蛋白质含量, 这会影响蜜蜂的饮食和健康, 从而导致蜜蜂种群的减少。1. The second paragraph is mainly developed by _. A. giving examples B. following the time orderC. explaining reasonsD. providing numbers【解析】选D。细节理解题。由第二段“Protein levels in pollen from . .
14、 . about 398 ppm. ”可知, 以前的黄花花粉中蛋白质含量为18%。今天的黄花花粉只有12%的蛋白质, 大约比172年前少三分之一。在同一时期, 二氧化碳含量上升了三分之一以上。早在170多年前, 它们在空气中的含量约为280 ppm。今天它们大约是398 ppm。所以第二段主要通过提供数字来展开段落, 从而说明二氧化碳含量在上升, 花粉中蛋白质含量在下降。故D选项正确。2. According to the text, Joan Edwards might agree that _. A. the drop of protein in pollen has a good inf
15、luence on beesB. todays flowers can provide bees with enough nutritionC. the drop of protein in pollen leads to a smaller population of beesD. the smaller population of bees has nothing to do with the human race【解析】选C。细节理解题。由第四段第一句以及最后一段可知, 研究人员之一琼爱德华兹说, 空气中二氧化碳含量的上升降低了花粉中的蛋白质含量, 这会影响蜜蜂的饮食和健康。近年来, 全
16、世界的蜜蜂种群一直在减少。所以根据短文, 琼爱德华兹可能同意花粉中蛋白质的减少导致了蜜蜂种群的减少。故C选项正确。3. What is the main idea of the text? A. Todays flowers contain more protein. B. Protein levels in pollen connect with CO2 levels. C. Drop of protein in pollen affects bees. D. Bee population is becoming smaller recently. 【解析】选C。 主旨大意题。由第一段和第四段“Joan Edwards
