Read the following article and select the best answer. Article: Who hasn't found themselves reaching for the closest food available when they're tired and stressed? More and more research is proving that this isn't all in our mind. Some foods really do lead to a change in our moods . Carbohydrate for calm This is how some people medicate themselves with food -- by reaching for cookies or pasta whenever they're upset. Unfortunately, it doesn't always work. You must eat a meal consisting of 100% carbohydrate, on an empty stomach, to obtain the serotonin increase so that you have a good mood. To get the wishedfor effect, you must not eat anything for four hours and then eat at least 30 grams of straight carbohydrate. Dry cereal , a piece of bread with jam, or a potato should _ Protein for power Of course, sometimes we don't need to be calm and sleepy.Sometimes we need a great deal of mental concentration, so this is when it's important to mix protein and carbohydrate. The protein will prevent the tryptophan from flooding your brain,and the rise in serotonin won't occur. Why dessert makes us happy Fat and sugar cause the brain to let go endorphins , which send pleasure signals throughout the body. This would be fine, except humans are not particularly good at stopping at one cookie or cake. You can also satisfy your sweet tooth by choosing fruit for dessert. Timing your meals for energy Blood sugar drops after four hours of going without food, causing a decrease in energy. Eating usually fixes this within 20 to 30 minutes, but don't suppose that eating more will cause a faster increase in energy. When you eat has as much of an effect on your mood as what you eat. If you regularly go for a long period of time between meals, rethink your schedule and plan ahead. Question: The main idea of the passage is _ . - eating for a better mood - eating to make you calm - eating for more protein - eating to make us strong
eating for a better mood

Read the following article and select the best answer. Article: Charlie works in a post office. His father lost his job five years ago and his mother is often ill. And he has two brothers and a sister. He works hard and tries his best to buy enough food for his family. Last month his family had to move to an old house outside the city. It's farther from the post office and he has to get up early in the morning in order to catch the 6:30 train. The head of his office is strict and everybody has to get there on time. He knows what it'll mean if he's late. A friend of his had pity on him and lent his old car to him. The young man was happy and from then on he could go to work by car. Last Saturday Charlie went to buy some medicine for his mother. Bad luck! When he came out of the shop, he couldn't find the car. He was quite worried and began to look for it in front of the shop but he didn't find it. Suddenly he saw a woman parked a car there and hurried into the shop. Charlie saw the car wasn't locked. He got on it and drove it at once. He was afraid the loser would run after him and drove fast. A truck hit it at a crossing and he lost consciousness. This morning the young man came back to life and saw there were a few policemen standing by his bed. He asked, "Where am I?" "In Room 103." "In hospital or in prison ?" Question: Charlie has to get to his office on time because _ . - the head is strict with them - he wishes to be praised - he's usually on duty - he's afraid to be fired
he's afraid to be fired

Read the following article and select the best answer. Article: "Iris scan , please," the bank's computer voice tells you . You step up and the computer reads your eye , comparing it to the stored file it has of your iris. The images had better match--otherwise you won't be able to get your money. Iris scanning and other technologies , such as fingerprint and voice scanning , have appeared in many science fiction movies in the past. Today , these advanced technologies are part of the real world. They are common at work, the bank, the airport, and your local prison. The iris scan, fingerprint scan, and voice scan are all examples of biometrics a fast developing area of automatic personal identification technology . Basically , biometrics uses various ways to verify a persons identity , based on the individual's unique characteristics ,including fingerprints , voices, irises, body heat patterns, facial images, handprints , signatures and so on. Biometrics identification systems have a number of advantages over password systems. The primary advantage is that an individual has to be physically present in order to be identified. Another important advantage is that there are no passwords to remember , forget, lose or steal. The voice scan is the simplest and most affordable form of biometrics . It only requires a computer, a microphone and the correct software. The software records a subject's voice and then compares it to a stored voice sample for identification purposes. For additional safety, fingerprint and handprint scans can also be employed . Fingerprint scans take the image of a fingerprint and compare it to a stored file of prints. Handprint scans identify the unique features of a hand. Iris scans currently give the highest level of accuracy among all the available biometrics systems. Another technology , full facial scans , is currently in use at border crossings and airports. Facial scanning equipment can actually track and identify moving faces within a crowd. The potential of biometrics is exciting and encouraging . With continued development , testing , and... Question: Which is the most accurate form of biometrics? - The voice scan - The fingerprint scan - The iris scan - The facial scan
The iris scan

Read the following article and select the best answer. Article: Nowadays, pollution is becoming worse and worse. A starry night seems to be a luxury for people living in cities. Is there any ideal place for stargazers ? A small town in New Zealand is here to surprise you with its breathtaking starry night sky. Lake Tekapo is located at the heart of New Zealand's South Island. It has been a popular tourist destination for stargazers. At night, innumerable stars dot the sky above the small town. The Milky Way and various constellations can be clearly seen. Visitors can also watch meteors shooting across the sky. For people living in big cities, these can only be seen in movies or fairytales. Though stargazing is common for people in Lake Tekapo, the local people have paid great attention to protecting their starry night sky. After midnight, all landscape lights must be turned off. In 2005, Lake Tekapo's starry night sky was even listed as a world heritage . Besides its starry sky, the town has many other things to offer. One of them is the flower, Russell Lupin. Every summer, Russell Lupins make Lake Tekapo more attractive. However, once the Russell Lupins die off, the banks of Lake Tekapo look bare. After reading the above introduction of Lake Tekapo, you must envy the local people a lot, because they can see the starry sky every night and appreciate the beauty of Russell Lupin every summer. If you are interested in Lake Tekapo, why not go and visit it this coming summer vacation? Question: Why do people go to Lake Tekapo according to the passage? - To observe its starry night sky - To visit its friendly people - To enjoy the beautiful lake - to make a wish at the shooting meteors
To observe its starry night sky