Read the following article and answer the question. Article: We live in a sweet world. The average American kid eats more than 20 teaspoons of sugar per day, and adults eat 50% more sugar today than they did in the 1970s. We all know that too much sugar isn't good for you. But did we know it could be dangerous? A team of researchers at the University of Utah used mice to do a study on the bad effects of sugar. They found it could have serious effects on people's health. Sugar is found not only in sweets and candies, but also in many household items like pasta and crackers. During the 58-week-long study, mice were fed a diet containing 25% more sugar. This percentage equals a healthy human diet along with three cans of soda daily. The team found that these mice were twice as likely to die as mice fed a similar diet without the sugar. Though the mice did not show signs of obesity or high blood pressure, male mice produced 25% fewer offspring than the other mice. Scientists often use mice for research because they have a similar genetic structure to humans. "Since most substances that are dangerous in mice are also dangerous in people, it's likely that those physical problems that cause those mice to have increased deaths also work in people,"says study author James Ruff of the University of Utah. Findings from this study show bad effects that are not as noticeable as weight gain or heart problems. Sugar can contribute to long-term changes in the body that can change development and even shorten lives. Cutting sugar out of the American diet altogether may be difficult. But making the effort to control our nation's sugar need will provide for a truly sweeter future. Question: The study done by researchers aimed at learning about _ Answer:
OPTIONS:
- the advantages and disadvantages of sugar
- the bad effects of sugar on people's health
- the genetic structure of mice
- American's eating habit.

Answer: the bad effects of sugar on people's health

Question: Read the following article and answer the question. Article: These are some signs that you can see on the roads of Great Britain. Number one is a sign with the number thirty on it. When drivers see this sign they must not go at more than thirty miles an hour. We see this sign when we get to parts of the country where there are many houses and other buildings, for example, when we are getting near a town. Thirty miles an hour is the speed limit. Number two is sign for the end of the speed limit. We are out of the town now and may go at more than thirty miles an hour. Number three is a sign that we are near a crossroads, that is, a place where two roads cross. We must drive carefully. Number four is a sign that there is a bend in the road. Again, we must drive slowly and carefully. Number five is a sign that there is a hill and number six is a sign that the roads get narrow. Drivers must go slowly and carefully. Number seven has the word "school" on it. This is a sign that there is a school at the side of a street or road. Perhaps there are children going to school or leaving school. So drivers must look carefully and go slowly until they are past the school building. Number eight is a sign with the letter P on it. The letter P is for "parking." A parking place is a place where drivers may leave their cars. If the driver of a car wants to leave his car and go to the shops, he looks for this sign. Then he knows that he may leave his or her car there. Question: Who will most probably read the passage? Answer:
OPTIONS:
- People who drive badly.
- People who are learning to drive.
- People who drive well.
- People who drive carelessly.
Answer: People who are learning to drive.

Question: Read the following article and answer the question. Article: A huge cloud of dust rose and an overpass disappeared. This was the scene in Zhuzhou,Hunan Province on May 17.Nine people were killed and 16 injured. Things were similar last year in the Sichuan earthquake. Thousands of people were buried in the ruins and lost their lives. What if we could have warned them? People are always _ to find a way of preventing buildings' collapse. Better materials and technology help,but they are not a solution. Just like humans,a building has its own life cycle from "birth" to "death".If we know when a building is going to collapse,we can repair it in advance or get out of it before it falls. Now,scientists at the University of Illinois have developed a material that turns red before it breaks. The invention could be used in things like climbing ropes or bridge supports. The research was led by Nancy Sottos,a professor at the university's Beckman Institute,and Douglas Davis,a graduate research assistant. The secret behind the colorchanging material is a type of molecule .A molecule is a group of atoms held together by chemical bonds. Imagine you and your friends standing in a circle,holding hands. Each person stands for one atom,your hands represent the bonds,and the entire circle represents a molecule. If one person lets go of his or her hands,the molecule changes color. The research team put the molecule into a soft material. When the researchers stretched the material,it turned bright red for a few seconds before it broke into two pieces. When they repeatedly stretched and relaxed the material,without breaking it,it only turned a little red. The major problem is that light can get rid of the red color. When the team shone bright light on the molecule,the broken bond was fixed,and the color disappeared. If the bright light keeps the red color from appearing,the material's warning system will be useless. Scientists still have a lot of work to do before the colorchanging molecules can be used outside the lab. Question: What can we infer from the passage? Answer:
OPTIONS:
- The colorchanging molecules are certain to be used outside the lab.
- There will be no collapse with the help of the colorchanging material.
- There is a long way to go before the material can be applied.
- The problem caused by bright light will be solved by scientists.
Answer:
There is a long way to go before the material can be applied.