Carrot juice, because of its many healthy benefits, is commonly called the "magic juice". It has been found that adding carrot juice to people's diets greatly improves their health. And its delicious taste makes it popular with all members of the family as a beverage. Carrot juice is one of the richest sources of vitamin A that can be used in the daily diet. Lack of vitamin A can cause dryness and damage to the skin, nails and hair. Drinking carrot juice to increase the vitamin A in the diet is said to be good for many parts of the body, including the bones and teeth. Drinking carrot juice is thought to be extremely helpful to the liver , because vitamin A helps to clean the liver and reduce fat in it. And it is suggested that drinking carrot juice should be done regularly, rather than just from time to time. Drinking carrot juice is also thought to improve the eyesight because of the vitamin A in the juice. Lack of vitamin A can lead to night blindness, which can be very dangerous, especially when the person is driving a car. An easy way to find out if you are lacking in vitamin A is to walk from a bright room into a dark room. Your eyes may have some trouble in getting used to the change of light if you are lacking in vitamin A. How can you make carrot juice? Wash some carrots well in cold water. Scrape them lightly, but do not peel them, as this will take away valuable vitamins and minerals that lie close to the skin. Lack of vitamin A can lead to _ . A) skin dryness B) broken bones C) complete blindness D) liver cancer
A
Are you ever so worried about something that you even have a headache or can't sleep at night? Do you ever feel a stomachache during a test? If so, then you know what stress is. Stress is what you feel when you are worried about something. When you are under stress, you may feel angry, sad, scared, or afraid --all this can give you a stomachache or a headache. In modern society, most people are under the higher stress than ever before. There are different kinds of stress. Some kinds of stress are good and others are bad. Good stress may happen when someone asks you to answer questions in class or when you have to give a report. This kind of stress can help you to finish things better. Under this stress, you will find yourself have more motivation and energy to study. However, bad stress can happen if the stress lasts too long. You may not feel well if a family member is sick, if you're having problems at school, or if anything else makes you upset every day. That kind of stress isn't going to help you. The best way to keep stress away is to have a balanced life. If you get enough sleep and food, and if you exercise and leave time for fun, you'll feel less stress. What is the purpose of the passage? A) To tell us how to lead a healthy life. B) To give us some advice on how to do better in a test. C) To tell us something about good stress and bad stress. D) To tell us about stress and how to face it.
D
Q: We are always attracted by the sea. From it we can get food, minerals and treasures. For thousands of years, we just sailed on it but couldn't go far under its surface. We want to explore deep into the sea. However, we are not fish. We must breathe, so we can't stay underwater for long. To explore deep water, we face even more dangers and problems. A diver trying to stay underwater for a long time must breathe air or a special mixture of gases. He can wear a diving suit and have air pumped to him from above. He can carry a tank of air on his back and breathe through a special pipe. Water weighs 800 times as much as air. Tons of water pushes against a diver deep in the sea, so his body is under great pressure. When a diver is under great pressure, his blood takes in some of the gases he breathes. As he rises to the surface, the water pressure becomes less. If the diver rises too quickly, the gases in his blood form bubbles . The diver is then suffering from a kind of illness. This kind of illness can cause a diver great pains and even kill him. Why does a diver get a kind of illness? A) Because he tries to do exercise underwater. B) Because he can't breathe enough air. C) Because he comes to the surface too quickly D) Because the air in his blood can be used up
A: C
(Q).
It's parents' worst nightmare. Their child doesn't come home one evening and is missing for several days. When a 14-year-old boy from Atlanta, Georgia disappeared earlier this year, his mother turned to her Smartphone for clues using an app called Family Tracker that helped track his location. "You can see where your loved ones are without having to call or bother them. "said Roberto Franceschetti of LogSat, the creators of the Family Tracker, which has more than 100,000 users and is available worldwide. Parents can track the location of their child on a map, send messages, and even sound an alarm on the phone in a long distance. "We have an option for the sender to make a very unpleasant, noisy sound. It's a loud alarm and we repeat that sound every two minutes until the person picks it up, "he said. Parents don't need to own a Smartphone to track their children. The service is also accessible through the web, as long as the phone that is being tracked is running the app. Family Tracker has an additional service that keeps records of all data from the app for a two-week period, which the company calls GPS breadcrumbs. "With a subscription , we keep all the locations where people have been on our servers. You can see where your kid has been for the past two weeks. You can find out where someone was at a certain time or when that person was at a specific place, "Franceschetti explained. "When somebody gets abducted , usually whoever does this throws the phone away or takes the battery out. We were hoping that our app would at least provide information on where the person was abducted or where they had been in the past. " But will these types of apps let out personal secrets? "The advantages are huge compared to the disadvantages. Let's not forget that the person always has to give initial permission--no one can be tracked unless they allow someone to do it. "said Franceschetti. According to the passage, all of the following about "Family Tracker" are true EXCEPT that _ . A) it can help parents know where their children are B) all parents don't need to own a Smartphone to track children C) parents can use all the services of the app for free D) it has little to do with letting out personal secrets
(A).
C