Read the following article and select the best answer. Article: As millions of playthings are recalled, doctors are reminded that the risks of lead exposure continue for young patients. Lead is such a well-known health - perhaps even contributing to the fall of the Roman Empire- that it came as a shock to discover that toys played by children could contain lead. Doctors are now dealing with the aftershocks. Just how dangerous is this exposure? That's the question physicians are being asked by parents who find a lead-polluted Elmo, of Dora. Millions of others toys, lunch boxes and pieces of jewelry manufactured in China have been recalled because they contain lead either in the paint that coats them or as a component of the plastic used to make the item more flexible. The lead content in some of the toys recalled this summer was 180 times the amount allowed by law. Some pieces of jewelry were almost 100% lead. Experts advise that the items do cause a risk and that doctors should urge parents to check the comprehensive lists of recalled products on the Consumer Product Safety Commission's Web site and return any appearing on those lists to the manufacturers. If exposure is suspected, a blood test is in order . Since there is no safe level of this universal element, the risk face by children for lead poisoning and its accompanying threat of learning disabilities and behavior problems is considerable. Doctors who have toys in their waiting rooms also are advised to see if any of them have been recalled and to check for chipped, flaking paint-even on those that haven't yet been recalled--since new announcements of toy risk continue. Question: Why does the author mention "the fall of the Roman Empire"? - To tell us a strange story. - To warn us to keep away from lead. - To explain why the Roman Empire fell. - To show how terrible lead poisoning is.
To show how terrible lead poisoning is.

Read the following article and select the best answer. Article: Friendship and friends continue to be the centre of our life. The relationship that we share with our friends is grounded in mutual care as our friends help us in _ our personalities as well. Even in this age of online social networking and e-cards, the need of keeping the network of friends, whether online or offline remains a primary concern for people. We may not completely understand what makes a friend but we all want to have a good number of friends around us. The first step to make friends with someone is to make them like you. If they don't like you in the first place, it is unlikely that they'll be eager to become your friends. To let someone know that you are specially interested in them, simple gestures like a little smile and calling them by their names can lay the basic foundation. To make the other person feel important to you, you need to be a good listener and encourage the other person to talk. Give your honest and sincere opinion but do not directly criticize or make fun of him or her. The second step of making someone your friend is to develop a mutual understanding. You need to share his or her experiences and it is necessary for you to develop a habit to see things from the other person's point of view. The third or final step towards friendship is to show your unconditional support and encouragement towards your friend. Moreover, you also need to be very clear about your expectations from your friend. If what you expect from the person you want to make friends with matches with what that person can give, the developing friendship between you and your friend is sure to be successful. Question: If you want to make friends with someone, you can _ . - show your interest with a smile to him or her - make him or her feel more important than you - never expect him or her to support you - have your own ways of seeing things
show your interest with a smile to him or her

Read the following article and select the best answer. Article: Feeling tired? Under too much stress? Well, you may want to try Yoga . It's what more and more people have been turning to to release the trouble of modern life. Practically unheard of in the West until 50 years ago, Yoga has become one of the most popular health trends around the world, including prefix = st1 /China. If you search for Yoga on line in Chinese, lots of pages are there to see, most of which are main pages of Yoga clubs. In order to keep fit and lose weight, many girls spend more than 1000 yuan taking part in Yoga classes every month. However, are you really ready for it? There are several things you need to know before you really take it. First, do not force your body too much. Yoga has many difficult poses. They are beautiful and worth boasting if you could finish them. But if you force yourself to do as exactly as an experienced Yoga teacher does, you may hurt your body, instead of strengthening it. Do you remember you original purpose for playing Yoga? It is self -building, not competing. Second, do some research about the Yoga class that you are to registering. Yoga is new in Chinaand there are not so many certificated well-trained Yoga teachers. Some not well organized clubs just find someone learn a little Yoga and certificate them. But be aware, a non- _ teacher might wrongly guide you and you could not benefit from the classes much except that they force you to exercise your body a bit. Considering about the large amount of money you invest in it, it's worth and reasonable to make sure the teachers in the club are qualified before you join. Third, it would be better to learn something about nutrition when you practice Yoga. In the very beginning, Yoga was part of the Vedas, bible of the traditional Indian philosophy. So it could be regarded as a kind of lifestyle. When you have decided to care for your body, why not feed it properly? In fact, good clubs have their own nutritionists. Anyhow, make sure you are ready before you act. The fashion may change quickly. But what... Question: From the advice offered by the author, we can conclude that_. - Yoga has nothing to do with culture - Yoga is somehow easy to exercise - many people learn Yoga in order to complete - not all the Yoga clubs have standard teachers
not all the Yoga clubs have standard teachers

Read the following article and select the best answer. Article: When you watch TV programs about wild animals, it is surprising to see how an antelope can escape a lion's attack. In the wilderness, everyone has a stunt. Even plants have their own ways of fighting off enemies. Over millions of years of evolution, plants have developed a unique defence system. Chemicals are wildly used for survival. By making their leaves, flowers, roots and fruits distasteful or poisonous to enemies, plants can fight back. One such plant is the Golden Wattle tree. The British scientist David Cameron has found when an animal eats the tree's leaves, the amount of poison increases in the other leaves. "It's like the damaged leaves telephoning the others telling them to fight together against the enemy, " he said. The tree also sends defence messages to neighboring plants by giving out a special smell. Golden Wattle trees in the surrounding 45 meters will get the message and produce more poison within 10 minutes. Now, if an enemy eats too many of the trees' leaves, it will die. Every species of plant or tree is good at the production of a particular set of chemicals. A _ that can safely eat the leaves of one tree may be poisoned by its neighbor. In this way, plants have developed not only individual defence system, but also shared it with others. This makes it impossible for a single animal to destroy even a small area of forest. Question: Which of the following can be the best title of the passage? - Plants Fight back with Poisons - Plants Can Kill Animals - Animals and Plants - Lions and Antelopes
Plants Fight back with Poisons