单元测评(四) Unit 4 Global warming
(时间：90分钟 满分：110分)
第一部分 阅读理解(共两节；满分30分) 第一节 (共10小题；每小题2分，满分20分)
阅读下列短文，从每题所给的四个选项(A、B、C和D)中，选出最佳选项。
A
Dear Dr. Laura，
I always enjoy listening to your radio program. I enjoyed your story about gift giving and unselfish (无私的) love. Some people doubt that such unselfish love exists in today's world. Well, I'm here to give them hope.
I wanted to do something very special for my fifteen-year-old son Tom, who has always been the perfect child. He worked all summer to earn enough money to buy a used motorcycle. Then he spent hours and hours repairing it until it looked almost new.
I bought him the shiniest helmet (头盔) and a set of riding clothes to wear. I could hardly wait for him to open up his gift. In fact, I couldn't get any sleep the night before.
Upon waking, I went into the kitchen to start making the coffee and tea. When I looked into the living room, I saw a beautiful keyboard and a note: “To my wonderful mother, all my love, your son.”
It had been a long-standing joke in our home that I wanted a piano so that I could take lessons. My husband's answer was “learn to play the piano, and I'll get you one.”
I stood there shocked, crying a river, asking myself how my son could afford this extravagant gift. Of course, everyone woke up, including Tom, and I immediately asked him to open my special gift. When he saw the
helmet and clothes, he had a strange look on his face. Then I realized what had happened. He had sold the motorcycle to get me the keyboard.
Of course I was the proudest mother ever on that day, and my feet never hit the ground for a month.
So I want people to know, that kind of love still exists and lives even in the world. I thought you'd love to share this story with your listeners.
A very proud parent
语篇解读 本文是应用文。作者在信中通过讲述儿子用暑假打工赚的钱给她买练琴用的键盘的故事，说明世间确实存在无私的爱。
1．What did the author feel about buying the helmet and clothes for Tom?
A. Very excited. C. Deeply moved.
B. Rather relaxed. D. Quite satisfied.
答案与解析 A 推理判断题。根据第三段中的“I could hardly wait for him to open up his gift. In fact, I couldn't get any sleep the night before”可推测，作者给儿子买了摩托头盔和赛车服之后，感到非常激动。
2．In the end, Tom used the money he had to buy ________. A. a shiny helmet for himself B. a new motorcycle for himself C. a piano for his father D. a keyboard for his mother
答案与解析 D 细节理解题。根据倒数第三段中的“He had sold the motorcycle to get me the keyboard”可知， Tom用暑假打工赚的钱给作者买了一个练琴用的键盘。
3．The underlined word “extravagant” in Paragraph 6 is closest in
meaning to “________”．
A. small C. ordinary
B. expensive D. interesting
答案与解析 B 词义猜测题。联系全文句意可知，作者觉得儿子给自己买这么贵重的礼物太不可思议了。故可推断extravagant与expensive含义接近。
B
Who left all those water footprints?
I used to look into my closet and see clothes. But these days, whenever I look at my shoes, shirts, sweaters and jackets, I see water.
Until last fall, I'd been oblivious_to my “water footprint”， which is defined as the total volume of freshwater that is used to produce goods and services, according to the Water Footprint Network in the US. It was through the Green Blue Book by Thomas M. Kostigen that I was able to see how my own actions contributed.
It takes 569 gallons (2,154 liters) to make a T-shirt, from its start in the cotten fields to the end product on store shelves.
I'd been satisfied with myself for the drinking water I had saved. I had put in water recycling systems to reuse the wastewater. I had set up rain barrels to collect storm water from my roof. But now I realize that my daily choices are using up an amazing amount of water too. The water footprint of my breakfast, lunch, dinner and snacks together amounts to 512 gallons of water each day just to feed myself.
In a word: alarming.
Even more alarming was how much water I was using to get dressed. A pair of shoes takes 1,247 gallons. It takes 7,996 gallons (30,268 liters) to make a leather jacket and 2,866 gallons (10,849 liters) to make a single pair
of blue jeans. If I imagine this for the clothes I buy every year, the result could fill my friend's swimming pool. I realized I could make some simple lifestyle changes. My decision is to buy second-hand items — and go shopping less.
More considerate living is the main idea behind the concept (概念) of the water footprint. It has an unusual advantage, too. I had a hamburger recently, and enjoyed it a lot more since it is now a treat rather than a weekly habit.
By Susan Carpenter, the Los Angeles Times
4．According to the article, which of the following has the biggest water footprint?
A. A T-shirt. C. A pair of jeans.
B. A pair of shoes. D. A leather jacket.
答案与解析 D 细节理解题。根据第三段“It takes 569 gallons to make a T-shirt, from its start in the cotton fields to the end product on store shelves.”和倒数第二段“A pair of shoes takes 1,247 gallons. It takes 7,996 gallons to make a leather jacket and 2,866 gallons to make a single pair of blue jeans.”可知leather jacket耗费水最多。
5．The underlined phrase “oblivious to” in Paragraph 2 can be replaced by ________.
A. interested in C. ashamed of
B. unaware of D. careful about
答案与解析 B 词义猜测题。Until last fall表示“直到去年秋天”的意思，也就说那之前作者根本就不了解water footprint的概念。
6．We can conclude from the article that the author ________. A. didn't like to recycle water before