Q: Read the following article and answer the question. Article: Are you an early riser or a night owl? Researchers from Aachen University in Germany believe that about 10 percent of people can be classified as "morning people", who feel more active and function best in the morning.Around 20 percent are night owls--people who naturally tend to stay up late and are more tired during the day.And the rest of us fall somewhere in between, according to New Scientist. Previous studies have suggested that early risers are more likely to be happy and healthy while night owls experience worse sleep as well as more depression and anxiety during the day. For a long time, scientists have been trying to find out what causes the differences between the two.A new study suggests that it isn't just people's habits--early risers and night owls actually have different brain structures. Led by Jessica Rosenberg at Aachen University, researchers scanned the brains of 16 early risers, 23 night owls and 20 people with intermediate sleeping hours.They found that the brains of night owls had less "white matter"--which speeds up the transmission of nerve signals -- in brain areas associated with depression. As you know, after people fly in an airplane from one time zone to another, they often suffer from a confused and tired feeling called "jet lag" because their body clocks are out of sync with the new time zone.It usually takes about a week for their bodies to adjust to the new time.But night owls always have difficulty syncing their bodies to the right time due to their brain structure."It's like they suffer from permanent jet lag," said Rosenberg. The good news is that it is possible for night owls to turn themselves into morning people.According to the researchers, night owls should try to spend as much time in the sunlight as possible and reduce their exposure to artificial light at night to force their body clocks to shift to a more normal rhythm. Question: What does the article mainly discuss? Answer: | OPTIONS:
- How to turn early risers into night owls.
- How our habits influence our sleep patterns.
- What causes the differences between early risers and night owls.
- Why early risers are happier and healthier than night owls.
A: What causes the differences between early risers and night owls.

Q: Read the following article and answer the question. Article: On the first day of class, Mr. Whiteson gave us a lecture about a creature called cattytiger, a kind of cat-like animal that completely disappeared during the Ice Age. He passed round a skull as he talked, and we all felt interested and took notes while listening. Later, we had a test about that. When he returned my paper, I was very, very surprised. There was a very large cross through each of my answers. And so it was with everyone else's in our class. What had happened? Everyone was wondering and couldn't wait to get the answer. Very simple, Mr. Whiteson explained. He had made up all that story about the cattytiger. There had never been such an animal. So why none of us noticed that and how could we expect good marks for the incorrect answers? Needless to say, we got very angry. What kind of teacher was this? We should have guessed it out, Mr. Whiteson said. After all, at the very moment he was passing around the cattytiger skull (in fact, a cat's), hadn't he been telling us that it completely disappeared during the Ice Age? Clearly he was telling a lie. But we just kept busy making notes and none used his head. We should learn something from this. Teachers and textbooks are not always correct. Question: Mr. Whiteson meant that _ . Answer: | OPTIONS:
- teachers couldn't make any mistakes
- textbooks might be wrong sometimes
- we should speak up if we thought our teacher or the textbook was wrong
- we shouldn't believe our teachers because sometimes they might tell lies
A: we should speak up if we thought our teacher or the textbook was wrong

Q: Read the following article and answer the question. Article: Forty-three years seems like a long time to remember the name of a mere acquaintance. I have forgotten the name of an old lady, who was a customer on the paper route in my home town when I was a twelve-year-old boy. Yet it stays in my memory, for she taught me a lesson of forgiveness that I shall never forget. On a winter afternoon, a friend and I were throwing stones onto the leaning roof of the old lady's house from a spot near her backyard. The object of our play was to observe how the stones changed to missiles as they rolled to the roof's edge and shot out into the yard. I found myself a perfectly smooth rock and threw it out. The stone, however, slipped from my hand and headed straight for a small window on the old lady's back porch. At the sound of fractured glass, we knew we were in trouble. We ran as fast as possible. I was too scared about getting caught to be concerned about the old lady with the broken window in winter. However, a few days later, when I was sure that I hadn't been discovered, I started to feel guilty for her misfortune. She still greeted me with a smile each day when I gave her the paper, but I was no longer able to act comfortably in her presence. I made up my mind that I would save my paper delivery money, and after three weeks I had the seven dollars that I thought would cover the cost of her window. I put the money in an envelope with a note explaining that I was sorry for breaking her window and hoped that the seven dollars would cover the cost. I put the letter through the letter slot in her door. My soul felt _ and I could have the freedom of, once again, looking straight into the old lady's kind eyes. The next day, I handed the old lady her paper and was able to return the warm smile that I was receiving from her. She gave me a bag of cookies. I thanked her and felt an envelope in it. When I opened the envelope, inside it were the seven dollars and a short note reading, "I'm proud of you." Question: How did the writer get to know the old lady? _ Answer: | OPTIONS:
- They were neighbors.
- The writer often played near the lady's house.
- The lady was the writer's customer.
- They got to know each other by chance.
A: The lady was the writer's customer.