[填空题]Paragraph Ten Some experts estimate that youngsters are bombarded with 10,000 food commercials each year during children’s programming, and most of them aren’t promoting salads or fruit. All this marketing changes children’s taste preferences and causes them to crave - and beg for - unhealthy foods.

[填空题]At Yale University, some ten students live off campus in a cooperative home they call the Green House.41)__________. Late at night, they drive to the store and quietly jump into its car-sized dumpster, picking out unopened packages of still fresh food. They find milk, eggs, bread and cookies, chocolate, soup, vegetables, even frozen pizzas and soymilk. Not only are most Green House residents vegetarian, but they are also moderate freegans, meaning that they eat mainly what they can get for free. These students, of course, are trying to leave as small an "ecological footprint" as possible.
42)__________. Across America other devout environmentalists tire "off the grid", building shacks in the wilderness without running water or electricity. Frustrated with environmental destruction and waste, they have renounced the system that fosters and perpetuates it. Such ascetic anti-consumerism may be the most dramatic side of environmentalism, and it leads to cultural ferment that can set i

[单项选择]Some of you may have finished unit one.（）, you can go on to unit two.
A. If you may
B. If you do
C. If not
D. If so

[单项选择]

Some pessimistic experts fleel that the automobile is bound to fall into disuse. They see a day in the not too-distant future when all autos will be abandoned and allowed to rust. Other authorities, however, think the auto is here to stay. They hold that the car will remain a leading means of urban travel in the foreseeable future.
The motorcar will undoubtedly change significantly over the next 30 years. It should become smaller, safer, and more economical, and should not be powered by the gasoline engine. The car of the futtire should be far more pollution-free than present types.
Regardless of its power source, the auto in the future will still be the main problem in urban traffic congestion(拥挤). One proposed solution to this problem is the automated highway system.
When the auto enters the highway system, a retractable(可伸缩的) arm will drop from the auto and make contact with a rail, which is similar to those powering subway trains electrically. Once att
A. its power source
B. its driving system
C. its mollitoring system
D. its seating capacity

[单项选择]Some pessimistic experts feel that the automobile is bound to fall into disuse. They see a day in the not-too-distant future when all autos will be abandoned and allowed to rust. Other authorities, however, think the auto is here to stay. They hold that the car will remain a leading means of travel in the foreseeable future. The motorcar will undoubtedly change significantly over the next 30 years. It should become smaller, safer, and more economical, and should not be powered by the gasoline engine. The car of the future should be far more pollution-free than present types. Regardless of its power source, the auto in the future will still be the main problem in urban traffic congestion (拥挤). One proposed solution to this problem is the automated highway system. When the auto enters the highway system, a retractable (可伸缩的) arm will drop from the auto and make contact with a rail, which is similar to those powering subway trains electrically. Once attached to the rail, th
A. A rail.
B. An engine.
C. A retractable ann.
D. A computer controller.