Question: I'm taking a test and have to guess the right answer to the question after the article. Article: Some people may be born happy, while others are genetically negative, scientists have suggested in a study published late February in a British journal. Earlier research had already established that the gene known as 5-HTTLPR plays a key role in determining how the neurotransmitter serotonin works within the brain. Serotonin, a hormone , passes chemical messages between nerve cells. It has been closely linked to mood. Several anti-depressant drugs regulate serotonin levels. Scientists had also identified three variants of the gene. Two so-called "short" variants were linked to a higher risk of depression and suicide attempts. Unlike the two "short" variants, the "long" variant of 5-HTTLPR showed a clear dislike of negative images, such as fierce animals, and a clear liking for positive ones, such as flowers. Researchers from the University of Essex in Britain showed participants a series of images, which were divided into three kinds: negative ones aimed at inspiring fear or stress such as a snake or person about to commit suicide, pleasant ones and neutral ones. The participants who had the long variant of the 5-HTTLPR gene "showed a clear dislike of negative material alongside a careful attention for positive material," the researchers found. They paid close attention to the pretty pictures, and ignored the frightening ones. On the other hand, the short variant groups had the opposite reaction. In January, the Australian government organized "happiness workshops", teaching government staff how to be happy. The department that held the "happiness workshops" said unhappy staff weren't productive staff. Australian political opposition parties have argued that the "happiness workshops" are probably a waste of money and couldn't increase productivity as intended. However, whether the workshop will have a happy or disappointing result, we will have to wait and see. Question: The article is mainly about _ . Options: A: the reason for the foundation of "happiness workshops" B: the link between people's mood and their gene C: the study on people's likes and dislikes D: the differences in people's attitude towards life
Answer: B

Question: I'm taking a test and have to guess the right answer to the question after the article. Article: Imagine that the genome is a book.The book consists of 23 chapters with thousands of stories made up of paragraphs, words and letters on different levels.There are one billion words in the book, as long as 800 Bibles; if I read the genome out to you at the rate of one word per second for eight hours a day, it would take me centuries; if I wrote out the human genome, one letter per millimeter, my text would be as long as the River Danube.This is a huge volume, a book of great length, but it all fits inside an extremely small cell nuclear that fits easily upon the head of a pin. The idea of the genome as a book is not, strictly speaking, even a metaphor.It is true to a great extent.A book is a piece of digital information, written in one-directional form and defined by a code that translates a small alphabet of signs into a large dictionary of meanings through the order of their groupings.So is a genome.The only difference is that all English books read from left to right, while some parts of the genome read from left to right while some from right to left, but never both at the same time. While English books are written in words of different lengthens using twenty-six letters, genomes are written entirely in words of three-letter length, using only four letters, and instead of being written on flat pages, they are written on long chains of DNA molecules . The genome is a very clever book, because in the right condition it can both photocopy itself and read itself. Question: We can learn from the passage that the human genome _ . Options: A: is as long as the River Danube B: can be easily placed on the head of a pin C: is coded with an alphabet of four letters D: is smart enough to read and take photos of itself
Answer: C

Question: I'm taking a test and have to guess the right answer to the question after the article. Article: Some pessimistic experts feel that the automobile is bound to fall into disuse. They see a day in the not-too-distant future when all autos will be abandoned and allowed to rust. Other authorities, however, think the auto is here to stay. They hold that the car will remain a leading means of urban travel in the foreseeable future. The motorcar will undoubtedly change significantly over the next 30 years. It should become smaller, safer, and more economical, and should not be powered by the gasoline engine. The car of the future should be far more pollution-free than present types. Regardless of its power source, the auto in the future will still be the main problem in urban traffic congestion ( ). One proposed solution to this problem is the automated highway system. When the auto enters the highway system, a retractable ( ) arm will drop from the auto and make contact with a rail, which is similar to those powering subway trains electrically. Once attached to the rail, the car will become electrically powered from the system, and control of the vehicle will pass to a central computer. The computer will then monitor all of the car 's movements. The driver will use a telephone to dial instructions about his destination into the system. The computer will calculate the best route, and reserve space for the car all the way to the correct exit from the highway. The driver will then be free to relax and wait for the buzzer ( ) that will warn him of his coming exit. It is estimated that an automated highway will be able to handle 10,000 vehicles per hour, compared with the 1,500 to 2,000 vehicles that can be carried by a present-day highway. Question: What is the author's main concern? Options: A: How to render automobiles pollution-free. B: How to make smaller and safer automobiles. C: How to solve the problem of traffic jams. D: How to develop an automated subway system.
Answer:
C