Teeth are important.Strong,healthy teeth help you chew foods that help you grow.They help you speak clearly.And,they help you look your best.Here are some _ for you to take care of your teeth. 1.Brush your teeth in the right way. Brush your teeth at least twice a day--after breakfast and lunch or after sweet snacks,too. Brush all of your teeth,not just the front ones,Spend time brushing teeth along the sides and back of your mouth.Brush away from your gums,too. Spend at least three minutes each time you brush.Play a song you like to help pass the time.Get a new toothbrush every three months.When you buy your toothbrush,be sure it has soft bristles. 2.Learn how to floss your teeth. Flossing is a very important way to keep your teeth healthy.Food may hide in places where a toothbrush cannot get to,like the space between two teeth.Flossing can help get rid of it.Carefully move floss between two teeth.Up and down.You'll need to floss your teeth at least once a day. 3.Have good eating habits. You need to be careful about what you eat and drink. Eating sugar is a major of tooth decay.Eating sugar before you go to bed can make things even worse,eat lots of fruit and vegetables and drink water instead of soda. Which is NOT mentioned in this passage? A) Flossing your teeth. B) Having good eating habits. C) Brushing your teeth. D) Going to see the dentist.
D
When you hear the word "farm", chances are you picture rolling hills in the country covered with cows and cornstalks. Some scientists, engineers and city planners say the farms of the future could rise straight into the air---in skyscrapers in the world's most populated cities. It might sound far--fetched, but in fact, some of the technology for growing crops indoors already exists. The scientists at the South Pole research station enjoy fresh salads every day from vegetables they grow in their own greenhouse. And NASA has been experimenting for years with methods for growing fresh fruits on the moon or even on Mars. As is known, traditional farming takes a plot of land as big as the entire state of Virginia just to grow enough food for 8 million people, says ecologist Dichson Despommer. Cities that can't grow their own food are often influenced by disasters such as hurricanes that can make it impossible for trucks to deliver fresh produce to grocery stores. In addition, fruit and vegetables grown outdoors face all kinds of dangers, from flooding to insect pests to weather instability, such as late or early frosts that can damage a crop. "You can control everything indoors. You can't control anything outdoors," Despommier says. To top it off, by the year 2050, the world population will grow by another 3 billion. "Where will we grow the food for all these people?" Vertical farming----growing crops in skyscrapers, tens of stories high----is the answer," says Despommier. Others say _ could provide new uses for hundreds of abandoned buildings in cities around the world. Crop waste, like leaves, would be composted , and the gases given off from composting would be used to heat the building. "I'd say it is going to be tough," says agriculturist Giacomelli. It can be tricky to regulate climate conditions indoors. Plus, plants differ in their weather and lighting requirements. Tomatoes like warm, sunny weather, while greens like lettuce prefer cooler temperatures. And nearly all crop plants require... What attitude does Giacomelli have towards the vertical farming? A) Positive B) Negative C) Uninterested. D) Uncertain
D
Q: Some problems are difficult to solve. But there are a lot of number expressions that can help. For example, if we put two and two together, we might come up with the right answer. We know that two heads are better than one. It is always better to work with another person to solve a problem. Some problems have only one solution. You cannot be of two minds over this. But with any luck,we can solve the problem in two shakes of a lamb's tail. In other words,we could have our answers quickly and easily. Sometimes we can kill two birds with one stone. That is, we can complete two goals with only one effort or action. But we must remember that two wrongs don't make a right. If someone does something bad to you, you should not do the same to him. If you are going out with your girlfriend,or boyfriend,but you don't want another friend to go along on your date,you can just say to your friend: two's company, three's a crowd. When I was a young child in school, I had to learn the three R' s. These important skills are reading, writing and arithmetic. These three words do not all start with the letter "R". But they have the sound of "R". My teacher used to give three cheers when I did well in maths. They gave praise and approval for a job well done. Some of my friends were confused and did not understand their school work. They were at sixes and sevens. In fact, they did not care if they finished high school. But they were happy when they completed their studies and graduated from high school. They were in seventh heaven. They were on cloud nine. Nine times out of ten students who do well in school find good jobs. Some work in an office doing the same things every day at nine-to-five jobs. You do not have to dress to the nines, or wear your best clothes, for this kind of work. What is the best title of the passage? A) Interesting Number Expressions B) The Importance of Numbers C) Number Stories D) Use Numbers
A: A
One period of our lives when better results are demanded of us is, strangely enough, childhood. Despite being young we are expected to achieve good grades, stay out of trouble, make friends at school, do well on tests, perform chores at home and so on. It's not easy. Likeable children enjoy many advantages, including the ability to deal more easily with stresses of growing up.In her bookUnderstanding Child Stress, Dr. Carolyn Leonard states that children who are likeable and optimistic are able to gain support from others. This leads to focus and resilience , the ability to recover from or adjust early to life stress. Much research shows that resilience has enabled children to succeed in school, avoid drug abuse, and develop a healthy self-awareness . Why does a likeable child more easily handle stress and do better in his or her life? Because likeability helps create what's known as a positive feedback loop . The positive feelings you want to see in other people are returned to you, creating constant encouragement and motivation to deal with the daily stress of life. This feedback loop continues into adulthood. To return once again to the example of teaching, learning becomes easier with a likeable personality. Michael Delucchi of the University of Hawaii reviewed dozens of studies to determine if likeable teachers received good ratings because of their likeability or because they in fact taught well. Delucchi found that "Students who perceive a teacher as likeable, in contrast to those who do not, may be more attentive to the information that the teacher delivers and they'll work harder on assignments, and they will learn more." You may have noticed this pattern in your own life when you try to give some advice. The more positive your relationship with that person, the more he or she seems to listen, and the more you feel certain that that person has heard you and intends to act on your words. According to Dr. Leonard, likeable children _ . A) will work harder on assignments and learn more B) can deal more easily with stress independently C) can achieve more and understand themselves better D) are always optimistic and ready to help those in need
C