TASK DEFINITION: In this task, you're given an article, a question which often contains a blank and four options (associated with "A", "B", "C", "D"). Your task is to find the correct answer (from the given options) for the question from the given article and return one of the options from "A", "B", "C", and "D". Do not generate anything else apart from one of the following characters: "A", "B", "C", "D". There is only one correct answer for each question.
PROBLEM: Article: A euphemism (from the Greek words eu--well and pheme--speak) is a word or expression that is used when people want to find a polite or less direct way of talking about difficult or embarrassing topics like death or the bodily functions.Most people,for example,would find it very difficult to say in plain language that they have arranged for their sick old dog to be killed.They would soften the pain by saying:We had Ruby put down or We had Ruby put to sleep.Many people prefer to call someone plain than ugly,or cuddly rather than fat. Euphemisms are an important part of every language,but it seems that English has an evergrowing number of them.The nonnative speaker not only has to make sense of the euphemisms he hears,he also has to learn which euphemisms are appropriate in any particular situation.He might be aware that his American friend needs to use the toilet when she asks where the bathroom (or restroom,or comfort station) is,but he is less likely to guess that his English friend has the same need when he says he has to see a man about a dog.He might have learned,for example,that in the family way is a euphemism for pregnant.If,however,he says to his boss,"Congratulations!I hear your wife is in the family way," he would be using an expression that is too familiar for the circumstances. Schools are full of euphemisms.At Frankfurt International School,for example,the special lessons given to students who are having difficulties in their school subjects are called Study Center (in the middle school) and Academic Workshop (in the high school).Teachers rightly do not want to upset students or parents by being too frank or straightforward,and usually choose a softer word or expression to convey the same message.
Question: According to the passage,people use euphemisms in order to _ .
Options: (A) make themselves understood (B) avoid embarrassment (C) to sound straightforward (D) attract attention

SOLUTION: B

PROBLEM: Article: Trees are useful to man in three important ways: They provide him with wood and other products; they provide him shade;. and they help to prevent droughts and floods. Unfortunately, in many parts of the world, man has not realized that the third of these services is the most important.In his eagerness to make money from trees, he has cut them down in large numbers, only to find that without them he has lost the best friends he had. And besides, he is usually too careless to plant and look after new trees. So the forests slowly disappear. This does not only mean that man will have fewer trees. The results are even more serious: for where there are trees, their roots break up soil allowing the rain to sink in and also bind the soil, thus preventing it from being washed away easily;but where there are no trees, the rain falls on hard ground and flows away, causing floods and carrying away the rich top-soil. When the top-soil is gone, nothing remains but worthless desert. Two thousand years ago,a rich and powerful country cut down its trees to build warships, with which to gain itself an empire .It set up the empire, but, without its trees, its soil became poor and grew weak. When the empire fell to pieces, the home country found itself faced by floods and starvation .
Question: The most important service of trees to man is that _ .
Options: (A) they give them wood and other products (B) they give them shade (C) they help him prevent droughts and floods (D) they help him made money

SOLUTION: C

PROBLEM: Article: Scientists are developing the next generation of robot-driven cars and predict they could be carrying humans around by the year 2030. The first wave of intelligent robot cars, capable of understanding and reacting to the world around them, will be tested this November in a competition run by the US Defense Advanced Research Projects Agency. Scientists are developing vehicles which will not only be driven by robots independently, but will be able to operate in a complicated city environment. "In the past it was _ for a vehicle just to perceive the environment," said Sebastian Thrun, a professor at Stanford University. "The new challenge will be to understand the environment. The robot must be able to recognize another car, to understand that it is moving and that it will interact with it as it gets closer." Stanford's entrant "Junior" is a changed 2006 Volkswagen Passat whose steering, throttle and brakes all have been modified by engineers. Lasers fitted on the car bumpers, radar and global positioning systems feed data into the on-board computer to determine its location and position. Thrun predicted that advances in artificial intelligence would lead to driverless cars on the roads by 2030. "Today they can drive about 100 miles, by 2010 I expect this to go 1,000 miles, by 2020 up to a million miles," he said. "By 2030 you'll be able to see them on the highway, with driving reliability that will beat humans." "We believe this technology will affect all of us. It is going to have enormous significance for people who can't drive because of disabilities or because they are ill or impaired." Thrun said he believed robot-driven vehicles would be deployed in war zones before they were seen in everyday civilian environments.
Question: Compared with the old robot-driven cars, the new ones _ .
Options: (A) can understand orders from humans (B) can perceive the environment dearly (C) are modified to be completely computer-controllable (D) not only can understand the environment but also can react to it

SOLUTION:
D