---This is my treat and next is yours. How’s that? ---Ok, ________.
A. It doesn’t matter B. It depends C. No way D. It’s a deal
The old worker has been fired and now a young man ______.
A. took place B. has taken the place
C. takes place of him D. has taken his place
Fill in the blanks with the proper forms of given words. (7’)
1.A double room with a balcony overlooking the sea had been __________ (reservation) for him.
2.Our new offices are still under ___________ (construct), and this is not my office.
3.Nov.11 is __________ (reference) to as “Singles’ Day” by netizens nationwide.
4.They launched a campaign to save wild pandas from __________ (extinct).
5.Her ___________ (decide) to live abroad was a terrible blow to her parents.
6.The directors of the company refused to undertake such a ___________ (risk) venture.
7.Children are not usually allowed in, but I’m prepared to make an __________ (except) in this case.
Directions: Translate the following sentences into English. You are required to use the word given in the bracket for each respective sentence.
1.他的成功与他的勤奋有密切关系。（relate）
2.那个有严重心脏病的老人明天将要动手术。(operate)
3.这个艺术家不得不在很小的时候自己照顾自己。（take care of）
4.任何事情如果要把它做好的话都需要大量的时间和精力。(involve)
5.老师坚持学生每日应有至少8个小时的睡眠。（insist）
The scientists observed that the more junk food the rats ate, the more they wanted to eat – a behavior very similar to that of rats addicted(上了瘾的) to heroin, a dangerous drug. Johnson said the experiment shows that the brain chemistry of obesity(肥胖) and drug addiction may be quite similar.
In their experiment, Johnson and his team studied the “pleasure center” of rats’ brains. The pleasure center is a complicated network of nerve cells. If the animal exercises or eats, the cells reward the animal by releasing chemicals into the body that make it feel good. And when the body feels good, the animal – or person – will want to do the behavior again.
For the experiment, Johnson fed foods like cheesecake to one group of rats. Food like this is high in calories and fat. Another group of rats got a regular diet. The rats that ate junk food started to eat more and more.
“They’re taking in twice the amount of calories as the control rats,” says Paul Kenny, one of Johnson’s colleagues.
Kenny and Johnson wanted to know what was going on in the brains of these rats. They first designed a way to deliver a small electrical charge to the rats’ brains. This electrical charge would stimulate the pleasure centers to release pleasure-causing chemicals. The rats could control how much stimulation – and how much pleasure – they received by running on a wheel. The more the rat ran, the more pleasure it received.
The rats that had been eating junk food started running more and more. This behavior suggested that the junk-food-eating rats needed more brain stimulation to feel good compared with rats on a normal diet. In other words, their pleasure centers were becoming less sensitive and the junk food didn’t make them feel good unless they ate more and more.
Experiments like this one could help scientists understand how chemicals in the brain contribute to obesity. With that information, they may be able to help people avoid obesity in the first place.
(Note: Answer the questions or complete the statements in NO MORE THAN TEN WORDS.)
1. The scientists suggested it was actually ___________________ that made the rats feel good.
2. How did the scientist know what was happening in the brains of the junk-food-eating rats?
3.What was the purpose of the experiment mentioned in the article?
Every time you go to the supermarket you come away with your purchases packed in plastic bags. But wouldn’t it be kinder to the environment if you asked for paper bags instead?
The answer is not as easy as it might seem. Environmentalists say there are drawbacks to using both plastic bags and paper bags.
80 percent of groceries in the US are packed in plastic bags and the numbers are becoming huge. Consumers use between 500 billion and 1 trillion plastic bags per year worldwide.
Some experts believe that all these bags harm the environment. Plastic takes hundreds of years to break down and, as it does so, poisonous materials are released into the water and soil.
Further damage is caused if plastic bags enter the sea. For example, endangered sea turtles cannot tell the bags from jellyfish, their main source of food, and often choke on them.
However, this kind of bag does have its advantages.
Paper bags use more energy and create more waste than plastic bags. Plastic bags require 40 percent less energy to produce and cause 70 percent less air pollution. They also release as much as 94 percent less waste into the water than paper ones do.
But paper bags do break down more quickly than plastic bags. They don’t endanger wildlife, either.
So what should we do? One possible solution would be to use biodegradable plastic bags. “Biodegradable” means that the bags break down naturally just like a piece of banana peel when it is left outside.
But until biodegradable technology improves, it might be easier to pack things you buy in reusable cloth bags.
1.Compared to paper bags, plastic bags ______.
A. produce 6 percent more waste
B. can be made biodegradable more easily
C. can be used as a source of food
D. save 40 percent of the energy
2.By saying “The answer is not as easy as it might seem,” (in paragraph 2) the writer means _____.
A. biodegradable plastic bags can compete with paper
B. paper bags seem to be kind to environment
C. it’s difficult to say whether plastic or paper bags are better for the environment
3.What does the author suggest people use at the present time?
A. Paper bags B. Plastic bags
C. Biodegradable plastic bags. D. Cloth bags.
