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I'm taking a test and have to guess the right answer to the question after the article. Article: If you were on the street in Mexico today you might think you were in an operating room, surrounded by doctors. You could see many concerned people with masks trying their best to stop the swine flu . And the masks aren't only being used in Mexico. A friend of mine traveling from New York City to Florida was given a mask and a pair of gloves just after he reached the airport. And another friend went to get a haircut only to be faced with a hairdresser wearing a mask! But do the masks really work? Is covering your nose and mouth the key to stopping the swine flu? To find out the truth, ABC's reporter Sharyn Alfonsi talked with germ expert Dr. Elaine Larsen. It turns out that when you sneeze the air coming out of your mouth at a speed of one hundred miles per hour carries germs which can travel anywhere around you and make people around you infected . However, whether you become infected actually depends on the weather. As Sharyn reported, when you sneeze, the germs leave your body in small drops of water coming out of your mouth. If the weather is wet, the wet air will make the small drops bigger and heavier and they drop down towards our feet. If this happens, we won't become infected. But if the air is dry, those small drops can float higher up, making it possible for them to touch someone else's nose, mouth or their mask. Larsen says the masks can stop the germs well but after a few hours, they start to get wet, holding a lot of germs they come across and causing you to breathe them in. The masks do work, but the key to stopping the germs is changing your masks often. Question: We learn from the passage that on a wet day _ . Options: A: sick people will be infected B: germs can spread very far C: germs spread very quickly D: few people will be infected
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D

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I'm taking a test and have to guess the right answer to the question after the article. Article: A study found that young people have a stronger and more unpleasant scent than the elderly,while elderly people's smell was the most distinctive,less intense and unpleasant. Researchers said the change in our smell is driven by the chemicals we release through our glands and the bacteria on our skin. To test whether or not it really exists,scientists collected a series of samples from three groups of 12 to 16 donors,aged 20 to 30,45 to 55 and 75 to 95.Volunteers wore special T-shirts fitted with underarm pads as they slept for five nights,after which the pads were cut up and put in glass jars. A separate group of 41 people aged 20 to 30 was then asked to smell two jars at a time and asked which group of the donors was older,as well as rating how strong and unpleasant each smell was. When asked to specify whether a particular sample was from a young,middle aged or old person,they were much more successful at identifying older people. Despite being the most distinctive,the older people's smell was also rated as being obviously less intense and less unpleasant than those from the other groups. Researchers said their findings appeared to contradict people's negative ideas about the old person's smell but admitted other factors,like smelly breath or skin,could be to blame for its bad reputation. "Similar to other animals,humans can give off body scents that allow us to identify biological age,avoid sick individuals and pick a suitable partner. Elderly people have a distinctive scent that younger people consider to be not very unpleasant. This was surprising given the popular conception of old age scent as smelly. However,it's possible that other sources of body scents,such as skin or breath,may have different qualities," said Dr Johan Lundstrom,who led the study. Question: According to the passage, people usually think that _ . Options: A: old people's scent is simply from their breath B: old people have a bad reputation mainly for their skin C: old people's scent is terrible and unpleasant D: old people give off a more pleasant scent
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C

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I'm taking a test and have to guess the right answer to the question after the article. Article: Leonardo da Vinci began painting the Mona Lisa in 1503.He was working on a special painting for a church at the time, but the church painting was not going well. An Italian businessman asked da Vinci to paint a picture of the businessman's second wife. This is the woman who can be seen in the Mona Lisa. All in all, the Mona Lisa is a very good example of da Vinci's work. Da Vinci uses darkness and light in a clever way in the painting. Da Vinci loved science and maths. Right away a person can see that there is a lot of geometry in the Mona Lisa. The face of the Mona Lisa is made of many circles and round shapes like balls. Even her smile can be seen as a small part of a large circle. The woman in the painting is sitting on a balcony , and mountains can be seen behind her. Da Vinci loved to study rocks and mountains, so these can be seen over and over in his other paintings. The woman is sitting with her knees to the side. Her head is turned to look out of the painting. Her hands are held together in front of her. This way of sitting is now used by many artists when they are painting a picture of a man or woman today. Question: What can a person see in the painting? Options: A: A lot of geometry. B: Clever use of light and darkness. C: Mountains. D: All of the above.
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D