Read the following article and select the best answer. Article: Have you ever wondered why stems grow upwards and roots downwards? Why plants always seem to turn, towards the light and climbing plants run up rather than down? The answer is simple:auxin,a chemical substance that controls growth in plants. Auxin gives away its secrets Auxin is a plant hormone . Darwin was already interested in it in the 19th century. Only in recent years, however, has the hormone started to give away its secrets ,thanks to intensive molecular research.Auxin is produced in the young,growing parts of plants and then transported throughout the plant-to a low -lying stem for example. The stem needs to straighten out as soon as possible to be able to absorb the topside,resulting in the underside growing faster and the stem straightening out. For the same reason, plants in front of windows will always turn to the light . This active regulation of auxin transport allows plants to take ideal advantage of local and changing conditions. A new means of transport for auxin? The transport of auxin through the plant plays a vital role. And ,from all appearances,it is not a simple matter. The researchers identified an important new link and means of transport for auxin: PILS proteins . PILS proteins are vital for auxin-dependent plant growth and adjust the intracellular storage of the hormone. It is exactly this compartmentalizing of auxin that seems functionally important for the various developmental processes. Growing crops more efficiently: the right amount of auxin in the right place Higher auxin levels at the right moment and in the right place result in better growth and greater harvest. Better adjustment of auxin levels would make plants grow more efficiently. The researchers hope to contribute to the development of more efficient growing processes by continuing to sort out auxin transport processes. Question: Which of the following is true of ausin according to the text? - It helps the plant to bend at the right places while growing. - It prevents the roots of plants from growing faster. - It is no use when the surroundings have changed. - It helps the underside of plants grow faster than the topside.
It helps the underside of plants grow faster than the topside.

Read the following article and select the best answer. Article: Researchers believe that the insect is better at managing congestion than humans. Ants are the most many type of animal on earth with brains that contain about 250,000 cells ---- the largest among insects. Now an intelligence expert Dr. Dirk Helbing says understanding more about ants could help solve one of the headaches of modern life -- road congestion. His team set up an "ant motorway" with two routes of different widths from the nest to some sugar syrup . Soon the narrower route soon became crowded . But when an ant returning along the crowded route to the nest met with another ant just starting out, the returning ant pushed the newcomer onto the other path. However, if the returning ant had enjoyed a trouble-free journey, it did not send the newcomer in a different direction. The result was that just before one route became _ , the ants had turned to another route and traffic jams never formed. The researchers also created a computer model of more complex ant networks with routes of different lengths. The team found that even though ants being sent in another direction sometimes took a longer route, they still got to the food quickly and efficiently. Dr. Helbing, of the Dresden University of Technology in Germany, said that while you cannot allow cars to meet with traffic coming in the opposite direction as a form of traffic control, you could do the next best thing and allow them to communicate. His plan is to force cars traveling in one direction to tell oncoming traffic what the conditions they are about to meet with-- so they can avoid that situation if necessary. Question: What's the advice that Dr. Helbing gives us? - The cars cannot be allowed to communicate with traffic coming in the opposite direction. - The cars can communicate with traffic in the same direction. - The cars that travel in one direction can tell oncoming traffic about the traffic conditions. - We should build more routes of different lengths and widths.
The cars that travel in one direction can tell oncoming traffic about the traffic conditions.

Q: Read the following article and select the best answer. Article: Amanda Clement grew up in Hudson, South Dakota. Baseball was always her favorite sport. Once in a while her brother Hank and his friends would let her play first base in their games. More often, however, they asked her to umpire for them, because they knew her calls would be fair and there would be no arguing. One day in 1904, Amanda and her mother traveled to Hawarden, Iowa, to watch Hank play for the home team against Hawarden. When they arrived at the ball field, two local teams were waiting to play a preliminary game. The umpire hadn't arrived, so Hank argued that the teams should let his sister serve as umpire. The players finally agreed. Amanda, then sixteen and standing five feet, ten inches tall, made perfect calls. She was so good that players for the main game asked her to umpire for them and even offered to pay her. Thus, at sixteen, Amanda Clement became the first paid female baseball umpire of all time. She is honored in the Baseball Hall of Fame in Cooperstown, New York. Question: Amanda most probably learned how to umpire a baseball game _ . - in her P. E. classes at school - in an umpire training school - by watching and playing the games - from her mother, a baseball umpire
A: by watching and playing the games

*Question*
Read the following article and select the best answer. Article: Parking has long been a major headache for drivers in Shanghai. The Transportation Department is _ a new plan for the city's parking system. There are one million cars on the road in Shanghai but only enough public parking space to provide room for 15 percent of these vehicles . It is no wonder that local drivers get so worried trying to find a place to park. The city is seeing a rise in private car owners. In March, the city sent out 2,000 private car licenses, the highest number of licenses ever sent out in a month. And prices rose to 14,600 yuan, 500 more than in February. Industry experts say this suggests that local people have a strong, active interest in buying cars. By the year 2020, the number of automobiles in Shanghai will probably reach two million. If one parking lot is for each car, then a lot of parking space should be built for these vehicles. Downtown Shanghai is most short of parking space. However, experts point out that simply building more parking lots in downtown areas is not practical and doesn't provide an ideal solution. The idea of " Park & Ride" system has been suggested. This means that drivers can leave their vehicles in car parks nearby subway or bus stations and ride public transport to go downtown. Based on this idea, the city will limit the number of parking lots in downtown areas and demand higher parking fees but build more parking areas near main subway and bus stops. Question: According to the idea of a " Park & Ride " system, the city will _ . - send out more private car licenses - build more parking lots near bus stops - encourage people to buy more cars - build more parking areas downtown
**Answer**
build more parking lots near bus stops