Article: Since ancient times, people have known about its ability to reduce pain and high body temperature. More than 2000 years ago, the Greek doctor Hippocrates advised his patients to chew on the bark and leaves of the willow. The tree contains a chemical called salicin . From salicin, researchers in the 1800s discovered how to make salicylic acid . And in 1897, a chemist named Felix Hoffmann at Friedrich Bayer and Company in Germany created acetyl salicylic acid. Later it became the active substance in a new medicine that Bayer called aspirin. The "a" came from acetyl. The "spir" came from the spirea plant, which also produces salicin. And the "in" Well, that is a common way to end medicine names. In 1982, a British scientist shared the Nobel Prize in Medicine in part for discovering how aspirin works. Sir John Vane found that aspirin blocks the body from making natural substances called prostaglandins .Prostaglandins have several effects on the body. Some cause pain and the expansion, or swelling( ; ), of damaged tissue. Others protect the lining of the stomach and small intestine. Prostaglandins also make the heart, kidneys and blood vessels work well. But there is a problem. Aspirin works against all prostaglandins, good and bad. Scientists learned how aspirin interferes with an enzyme . One form of this enzyme makes the prostaglandin that causes pain and swelling. Another form of the enzyme creates a protective effect. So aspirin can reduce pain and swelling in damaged tissues. But it can also harm the inside of the stomach and small intestine . Question: What can we know about Prostaglandin according to the passage? Yes or no, is the answer "It is sometimes good but sometimes bad."?
No

Article: In Germany, English expressions are used in conversations and increasingly in written form. Advertisements are often expressed completely in English. When I go to the gym, there are "aerobic-classes ". We "warm up". We go "jogging." In business, we attend a "meeting" and we have "good connections." Other nations, like France, have taken action to protect their language from the influence of "Americanization". In Germany, however, there is concern that those rules could be connected with Hitler's Third Reich , when the language had to be pure. If the government curbed the use of English words now, this could be considered by some as a return to that terrible past. Some German citizens are now trying to stop the use of English vocabulary in German. However, I think generally it is not a big deal to use some common English expressions as they often describe things more directly. But we should know that it is important to use English correctly. All too often, bad English is spoken or even written instead of good German. The proper use of the German language would be the better choice. However, there are some fields that require the use of English words, for example, in the high-tech communication and the Internet fields, there is no alternative to English. Also, I think sometimes I have to speak English when I introduce some scenic places to tourists. I think you have to find a balance and decide when it is better to use good German in place of bad English or when the use of correct English words is more suitable. Languages have always changed naturally, and I disagree with a restriction by law. Some nice expressions borrowed from other languages can make a conversation more vivid. Question: What is the writer's attitude towards the use of English in Germany? Yes or no, is the answer "Proper use of English can make conversations more colorful."?
No

Q: Article: American scientists have developed the first material that repairs itself. The material is a form of plastic that has been engineered to fill breaks in its surface. Plastics are used today in everything. Scientists wanted to find a way to make objects made of plastic last longer. The researchers hope their new discovery can be used to make objects that are difficult or impossible to replace. The surface of plastic objects breaks over time. Very small breaks develop every time a plastic object is used. The researchers wanted to find out how to stop plastic from developing small breaks that weaken and destroy it. They found the answer in the chemical structure of plastic itself. The research team found a way to make plastic that contains very small balloons filled with monomer liquid. When the new plastic cracks, the monomer liquid is let out and flows into the crack. Thus the break is repaired. The repaired plastic has seventy-five percent of the strength of undamaged plastic. The new self-repairing plastic is not yet ready for production. But it has several possible uses. One could be in space vehicles where parts cannot be repaired or replaced. Another possible use might be in bridges. And it could be used in people, to replace bone joints that have become broken or damaged. Question: We know from the passage that the repair is done as _ . Yes or no, is the answer "the plastic cracks"?
A: No

*Question*
Article: What is a six-letter word that immediately comes to mind when you need some information on the Internet? You probably thought of Google. But Google wasn't always the name of the famous search engine. In fact, the original name was BackRub! BackRub was the name two graduate students gave to the new search engine they developed in 1996. They called it BackRub because the engine used backlinks to measure the popularity of Web sites. Later, they wanted a better name -- a name that suggests huge quantities of data. They thought of the word googol. (A googol is a number followed by 100 zeros.) When they checked the Internet registry of names to see if googol was already taken, one of the students misspelled the word by mistake, and that's how Google was born. Google is just one example of a name change in the business world. Many other companies have decided to change their names or the names of their products. Here are some more examples: Jerry Yang and David Filo, two young computer specialists, developed a guide to Internet content in 1994. They called it "Jerry and David's Guide to World Wide Web." But they soon realized that this wasn't a very catchy name, so they searched through a dictionary and found a better one: "Yahoo." Sometimes companies change their names because of the popularity of one of their products. In 1962, a young runner named Phil Knight started a company called Blue Ribbon Sports. In 1971, Knight decided to design and manufacture his own brand of shoes. He named the shoes after the Greek goddess of victory -- Nike. Nike shoes became so well known that Knight changed the name of the whole company to Nike. Question: According to the text, Google _ . Yes or no, is the answer "is a result of a spelling mistake"?
**Answer**
No