Ques:Scientists have long had it in their mind to make a robot lizard  . They began with finding out why a lizard can hang on a wall. They noticed the lizard's toes were unique: They have suckers  , which enable it to hang on walls. They, therefore, made a robot with suckers on its hands and feet. The robot could hang on the wall but fell off when crawling. So, they went on researching. 6 years ago, scientists discovered that suckers only were not enough. It is the bristles   on each foot that adds friction   and static adsorption   that makes a lizard move on the smooth wall easily without falling down.  Then scientists made great efforts to fix thick bristles to the robot's hands and feet. However, the effect was not satisfactory. The robot still couldn't attach itself firmly to the wall.  Scientists got puzzled: How on earth can the lizard crawl on an extremely smooth wall or even on a ceiling without dropping off?  An accidental finding inspired them: One day a scientist happened to see an animal attack a lizard and bite off its tail. The lizard broke away from the animal's teeth and threw itself on a wall to escape, only to fall off heavily on the ground. The scientist wondered: Is it the tail that plays an important role in its travelling on the wall? He caught some lizards for an experiment. The result proved his assumption: A tailless lizard has no trouble walking on an ordinary wall but can't on a smooth one. A further study showed the lizard's tail can prevent it falling over backward and, what's more, that the tail acts as an additional leg while one of the lizard's legs leaves the wall, which is always the case while it is walking on the wall.  Thus, Tailbot, a super tailed robot, is born. What part(s) would be a must if scientists just wanted a robot which can hang on the wall? A) Suckers. B) Suckers and bristles. C) Suckers, bristles and a tail. D) Hands, feet, bristles and a tail. Ks5u

Ans:A
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Ques:Perhaps you have heard a lot about the Internet, but what is it? The Internet is many different networks around the world. A network is a group of computers put together. These networks joined together are called the Internet. Maybe that doesn't sound interesting. But when we've joined the Internet. There are lots of things we can do. We can have a lot of interest on the World Wide Web (www). We can use the internet instead of a library to find all kinds of information for our homework.. We can find information about our favorite sports or film stars and do shopping on the Internet. We can also send messages to other people by e-mail. It is much cheaper and quicker than calling our friends or sending letters. Thanks to the Internet, the world is becoming smaller and smaller. People can now work at home with a computer in front, getting and sending the information they need. They can buy or sell whatever they want by the Internet. But do you know 98%of the information is English? So what will English be like tomorrow? What does the writer try to tell us with the last two sentences? A) The Internet is more and more popular. B) All the information is English. C) English is important in using the Internet. D) Every computer must join the Internet.

Ans:C
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Ques:When someone says "SHARK" most people think of a big, toothy, underwater animal; basically we are imagining a Great White. In fact sharks come in all shapes, sizes and even colors! Follow me please; I'd like to show you a very special small shark commonly known as horn sharks, only found in the coastal waters of north-west North America. Look at this shark, and you can easily see the horns on it and you will know the reason why it is called the horn shark is that it has the broad, flattened head and two large horn-like spines  found behind its eyes and makes it one of the hardiest of all shark species. What makes it unique is that as its enemy attempts to swallow it, the spines on its back will stick into the enemy's mouth and give a good chance for it to get away. The horn shark is brown in color with black spots all over its body. The adults can reach up to a length of 4 feet and weigh up to 10 kg. An interesting fact about the horn shark is that it has five gills . The horn shark is a clumsy swimmer using its flexible pectoral fins to push itself along the bottom of the ocean. The maximum distance that has ever been recorded for a horn shark to have traveled out from its habitat is 10 miles. Today, as so little is known about its population off the Californian coast, they have been listed as being "Data Deficient" in the World Conservation Union. The horn shark is being threatened both by water pollution and commercial fishing in the area. Though they are not among those sea creatures hunted primarily for food, but they often get caught as a by-catch in fishing expeditions. The horn shark gets its name for  _  . A) its small size B) its large eyes C) its two large spines D) its brown color with spots

Ans:C
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Ques:The entertainment profession or "show business" attracts many young people. Unfortunately, only very few can hope to become famous and successful. Talent is not enough, because show business is as competitive as any other business .Without a good manager ,a performer can never hope to succeed .Fashion is important in this business, too. The best tailor in the world will never be a success if he makes old-fashioned clothes. In exactly the same way, a performer must change his "act" in order to follow the taste of the moment. This is true for actors, dancers and comedians, but perhaps most of all singers. "Pop" stands for "popular" and a pop singer has to work very hard to become popular .He must either give the public what they already want, or he must find a new way of singing that will attract their attention. Even when he has succeeded, and his records are sold everywhere, he can not relax. Then he must work harder than ever because there are always younger singers trying to become famous and to steal some of the popularity.The life of a successful pop singer is not at all easy. He can only relax when he is alone, because everything he does is watched and reported in the special newspaper written for the "fans". The fans are the most important people in the world for the singers. They buy his records, they go to his concerts and they make him rich and famous. But they can be very annoying, too. Sometimes their enthusiasm get so hysterical that they do anything to get a "souvenir" . They steal handkerchiefs, they tear off buttons, and they even cut off pieces of the unfortunate singer's hair. Many singers have been forced to hide. A pop singer has to spend a lot of money on clothes, because he must always look smart or at any rate different. He must have a luxurious car. And -- most important -- he must always keep smiling for the benefit of his public. Why must a pop singer have a good manager?  _  . A) To protect him from his fans B) To look after his business interests C) To help him to change his "act" D) So that he can relax

Ans:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
B
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