Problem:OPTIONS:
- prove their importance
- threaten the government
- ask for higher salaries
- appeal to the public not to litter

Read the following article and answer the question. Article: There's something rotten in Rio and the smell is coming from the huge stacks of rubbish pried up on sidewalks all over the city. Rio's street sweepers chose the carnival holiday to demand better salaries. Their wages start at roughly $400 a month. There could hardly be a better time for them to prove their importance. The streets were left a mess after hundreds of carnival parades and now, rubbish pries up in both poor and uptown neighbourhoods and in tourist areas like Ipanema or Copacabana beach. The president of Rio's rubbish collecting company has even appealed to the population to store rubbish at home whenever possible. He says 30% of the city's sweepers have gone on strike. Some of those who have been working have been threatened by the strike movement so now the police has been deployed alongside rubbish collectors to keep them sage as they go about their business. The strike has divided opinions in Rio. On social media, many support the sweepers' demands for better salaries. Others say they are opportunists and the situation is a big embarrassment to the city. But Brazil's culture of littering the streets doesn't help. A video that went viral online shows that even authorities have a problem with that. Rio's mayor, Eduardo Paes, is seen throwing what seemed to be the rest of an apple on the sidewalk--and now promised to impose himself a fine for his wrongdoing. His government recently created a programme to keep Rio's residents from littering the streets. Question: Rio's street cleaners go on strike to Answer:
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A: ask for higher salaries

Problem:OPTIONS:
- the kinds of crops to be planted together
- the way for different crops to be mixed
- both A and B
- either A or B

Read the following article and answer the question. Article: Farmers can produce more by planting several different crops in the same field.But their success depends on which crops they plant together and how they mix them in the filed.In the past, the only way the farmers could learn which crops grow best together is to plant them and wait for the results.Now, however, a computer can give them answers.A new computer program written by Dr John Vanderwell of Michigan University can tell a farmer which plants grow well together and which do not.It can tell him how to plant the different crops; if he should plant each in a separate row, or mix the crops in the same row.It can tell the farmer how changes in planting each of the crops will affect the production of all of them.And it can tell him which plants can help reduce losses from diseases. Question: According to the passage, to get the best result, one needs to choose carefully _ . Answer:
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A: both A and B

Problem:OPTIONS:
- Milan's air is considered to be worst polluted in Europe.
- Experts think that the air in Milan is badly polluted.
- The reason for the air pollution in Milan.
- Measures have been taken by Milan to reduce the air pollution.

Read the following article and answer the question. Article: Milan, the second largest city of Italy, has won an undesirable world record. Of the 54 big cities studied by the World Health Organization and the United Nations, Milan is considered to have the worst air pollution. According to these two10-year studies, the level of air pollution in Milan is twice as high as the levels in Paris and Beijing and three times those in Tokyo and London, and four times that in New York. The reason for Milan's bad pollution, to some experts, is that the city lies in a valley that holds back the poisonous gases. Though Milan has taken some measures to lower the level of pollution, the situation is still worrying. People joke to each other, "If you are traveling to Milan, be sure to bring your gas mask." In order to reduce the use of private cars, in 1979, the government in Milan began an interesting experiment: passengers in the city buses did not have to pay for their tickets. Question: Which of the following statements is NOT mentioned in the text? Answer:
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A: Milan's air is considered to be worst polluted in Europe.

Problem:OPTIONS:
- The beggar was once her friend.
- She felt very pity for the beggar.
- The beggar once offered her a free meal.
- She once worked with the beggar.

Read the following article and answer the question. Article: "Good morning!" said a woman as she walked up to an old man sitting on the ground. The man slowly looked up. He was Jack, who had been begging around here for a couple of years. "See thatcafeteria over there?" she asked. "I'm going to get you something to eat and get you out of the cold for a while." She sat down at the table across from her amazed dinner guest. She stared at him intently. "Jack, do you remember me?" Old Jack thought hard and said, "I think so--I mean you do look familiar." "I was thin and hungry," she said. "Maybe I've _ now more than when you worked here. That was when I was just out of college. I had come to the city looking for a job, but I couldn't find anything. Finally I was down to my last few cents and had been kicked out of my apartment. I walked in the streets for days, cold and hungry. I saw this place and walked in hoping that I could satisfy my hunger." Jack lit up with a smile. "Now I remember," he said. "I was behind the serving counter. You came up and asked me if you could work for something to eat. I said it was against company's policy." The woman continued, "Then you made me the biggest roast beef sandwich, gave me a cup of coffee, and told me to go over to a corner table and enjoy it. I was afraid that you would get into trouble. Then, I saw you put the price of my food in the cash register." "So you started your own business?" old Jack said. "I got a job that very afternoon. I worked my way up. Eventually I started my own business that, with the help of God,prospered." She opened her purse and pulled out a business card. "When you are finished here, I want you to pay a visit to a Mr. Lyons, the personnel director of my company. He'll find something for you to do around the office." She smiled, "If you ever need anything, my door is always open to you." There were tears in the old man's eyes, "How can I ever thank you?" he said. "Don't thank me;" the woman answered, "thank yourself. It was your kindness that let me know you." Question: Why did the woman invite the beggar to dinner? Answer:
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A:
The beggar once offered her a free meal.