Ques: Article: After sunset on our last day at the farm I walked out into the desert. In this, the first pleasant moment for a walk after long hot hours, I thought I was the only thing out of doors. Suddenly I stopped. Before me a rattlesnake lay fixed, its head not yet drawn back to strike but only turned a little to watch what I would do. Many snakes will run away at the sight of a man but this rattlesnake felt no necessity to get out of any-body's way. He held his ground in calm watch-fullness waiting for me to show my intentions. My first aim was to take no notice of him; I had never killed an animal if I was not forced to kill. But I remembered that there were children, dogs and horses at the farm as well as men and women with thin clothes on; my duty was to kill the snake. I went back to the farm and returned with a stick. The rattlesnake had not moved; he lay like a wire but more quickly than I could stride he shot into a bush and set up his rattling, warning me by this that I had made an unreasonable attack and attempted to take his life and that if I insisted he would have no choice but to take mine if he could. For a moment I listened to this terrifying sound and then I struck into the bush with my stick and, chop-ping about, dragged him out of the bush with his back broken. He struck once more at the stick but a moment later his neck was broken and he was soon dead although when I picked him up by the tail his mouth opened, proving that a dead snake may still bite. There was blood in his mouth and poison was dropping; it was not only a dis-gusting sight but a pitiful one too. I dropped the body into a green bush and, as I did so, I saw him in my imagination, crawling over the sands as he might have done if I had let him go. Question: The author had to kill the rattlesnake because_. Yes or no, is the answer "its presence was a danger to the people and animals at the farm"?
Ans: No

Ques: Article: There is an English saying :"laughter is best medicine ."Until recently ,few people took the saying seriously .Now however ,doctors have begun to look into laughter and the effects it has on the human body .They have found that laughter really can improve people's health . Tests were carried out to study the effects of laughter on the body .People watched funny films while doctors checked their hearts ,blood pressure ,breathing and muscles .It was found that laughter had similar effects to physical exercise .It increases blood pressure ,the heart beating and breathing ; it also works several groups of muscles in the face ,the stomach ,and even the feet .If laughter exercises the body ,it must be beneficial . Other tests have shown that laughter appears to be able to reduce the effect of pain on the body .In one experiment doctors produced pain in groups of students who listened to different radio programmes .The group that tolerated the pain for the longest time was the groups which listened to a funny programme .The reason why laughter can reduce pain seems to be that it helps to produce a kind of chemicals in the brain which _ both stress and pain . As a result of these discoveries ,some doctors in the United States now hold laughter clinics ,in which they help to improve their patients' condition by encouraging them to laugh .They have found that even if their patients do not really feel like laughing ,making them smile is enough to produce beneficial effects similar to those caused by laughter . Question: Doctors hold laughter clinics _ . Yes or no, is the answer "in order to improve patients' health"?
Ans: Yes

Ques: Article: Bigger-brained birds survive better than their feathered friends with smaller brains, according to a study published on Tuesday. Scientists have suspected that birds with large brains in relation to their body size lived longer because they were able to adapt their behavior to environmental challenges. Now they have provided evidence that it does. "We have tested the hypothesis that the brain can buffer animals against the environment and help them to survive when they face environmental challenges," said Daniel Sol of the Centre for Ecological Research and Forestry Applications in Barcelona, Spain. After comparing death rates, brain size and body mass of 236 species of birds from different regions of the world, Sol and scientists in Britain, Hungary and Canada discovered that the bigger the brain the better. Crows and parrots have the largest brains, while pheasants have a relatively small brain. Earlier studies have shown there is a relationship between the size of the brain and an animal's capacity to create new behavior and adapt more easily. "The idea is that if you have a big brain, you are more capable of adjusting behavior and responding to environmental changes. This can help you to survive," said Sol, who reported the finding in the journal Proceedings of the Royal Society B: Biological Sciences. Tamas Szekely of the University of Bath in England and a co-author of the report, said birds were ideal to test the hypothesis because they are the only species in which brain size and behavioral response to environmental challenges such as climate and habitat destruction is understood. Question: According to the text we can know that the report of the finding was written by _ . Yes or no, is the answer "Daniel Sol and Tamas Szekely"?
Ans: No

Ques: Article: The African elephant, the largest land animal remaining on the earth, is of great importance to African ecosystem . Unlike other animals, the African elephant is to a great extent the builder of its environment. As a big plant-eater, it largely shapes the forest-and-savanna surroundings in which it lives, therefore _ of existence for millions of other animals that live in its habitat. It is the elephant's great desire for food that makes it a disturber of the environment and an important builder of its habitat. In its continuous search for the 300 pounds of plants it must have every day, it kills small trees and underbushes, and pulls branches off big trees. This results in numerous open spaces in both deep tropical forests and in the woodlands that cover part of the African savannas . In these open spaces are numerous plants in various stages of growth that attract a variety of other plant-eaters. Take the rain forests for example. In their natural state, the spreading branches overhead shut out sunlight and prevent the growth of plants on the forest floor. By pulling down trees and eating plants, elephants make open spaces, allowing new plants to grow on the forest floor. In such situations, the forests become suitable for large hoofed plant-eaters to move around and for small plant-eaters to get their food as well. What worries scientists now is that the African elephant has become an endangered species. If the elephant disappears, scientists say, many other animals will also disappear from vast areas of forest and savanna, greatly changing and worsening the whole ecosystem. Question: What is the passage mainly about? Yes or no, is the answer "The effect of African elephants' search for food."?
Ans:
No