Enough sleep is important to health. The amount of sleep needed depends on the age of the person and the conditions in which sleep takes place. The young may need more sleep than the old, but usually eight hours are enough for the health of grown-ups. Some can do with less than this amount, but others may need more. Every person knows his own need. It is then a matter of good judgment to satisfy his need. Sleep should always be enough to make one bring back his strength and get ready for a day's work. Fresh air is necessary to sound sleep. It is not without reason for some people to think that it is practicable to sleep in the open air. When one can keep himself warm, out-of-door sleeping probably gives the body its most complete relaxation . Ability to sleep is largely a habit. The conditions referred to only lead to sleep. Out-of-door exercises, a good habit of regular hours and the avoidance of late eating and worry, which are largely within the control of any person, are all helpful to sound sleep. A bath at bedtime, neither hot nor cool but of body temperature, may be helpful to sleep. Sleep-producing drug should never be taken except when suggested by a doctor. The amount of sleep a person probably needs has something to do with _ . A) his character B) his control C) his age D) his habit
C
(Question)
Have you ever noticed the colour of the water in a river or stream after a heavy rainfall? What do you think caused this change in colour? It is soil that has been washed into the river from the riverbank or from the nearby fields. Components of Soil Soil is made up of a number of layers, each having its own distinctive colour and texture. The upper layer is known as the litter. It acts like a blanket,limiting temperature changes and reducing water loss. The topsoil layer is made up of small particles of rock mixed with rotten plant and animal matter called humus , which is black and gives the topsoil its dark colour. This layer is usually rich in nutrients, oxygen, and water. Below the topsoil is the subsoil, a layer that contains more stones mixed with only small amounts of organic matter. This layer is lighter in colour because of the lack of humus. Beneath the soil lies a layer of bedrock. Soil forms from the bottom up. Over time bedrock is attacked by rain, wind, frost, and snow. It is gradually broken down into smaller particles in a process called weathering. Plants begin to grow,and rotten materials enrich the topsoil. Most of the soil in Eastern Canada ,for example ,was formed from weathered rock that was exposed when the ice disappeared 12,000 years ago. Water Beneath the Soil Surface water collects and flows above the ground in lakes ,ponds, and rivers. Once in the soil or rock, it is called groundwater. Gravity pulls groundwater through the soil in a process called percolation . Eventually the water reaches a layer called the water table. Under this is bedrock through which water cannot percolate. As water percolates downward, it _ organic matter and minerals from the soil and carries them to deeper layers.This causes a serious problem because plants require these nutrients for growth. Soil pH Soil can be acidic, neutral, or basic. The pH of the soil is determined by the nature of the rock from which it was formed,and by the nature of the plants that grow and rot in it. The acidity of rain and... According to the text, which of the following is NOT true? A) Soil forms from weathered rock on the earth surface. B) Air pollution is partially responsible for acid soil. C) The deeper layer of soil is darker in colour than the surface soil. D) Groundwater tends to carry away nutrients for plant growth.
(Answer)
C
Ques: My passion started decades ago as a kid on a flight to India. I was attracted by how such a large airplane was able to glide smoothly above the clouds. I made it a goal to become a pilot. I am now a pilot for American airlines. Though being a pilot consumes my life,it is a job worth doing. My job is slightly different compared to that of a typical pilot. Most pilots have their routes they fly. They then familiarize(...)themselves with the routes. However, in my case,I participate in any job where a pilot is immediately required. It is true that some days I might have a workday from nine in the morning to five in the afternoon. In fact,some days,I might even begin my work at three in the morning when I am needed to fly. Sometimes, as for the typical day,I do not have one. Having been on the job for over two decades,I have learned some important life lessons. As I greet passengers boarding the airplane,I realize I,along with other airline pilots, have enhanced the lives of those who we are serving. In fact, there is one particular experience that I will never forget. A family was walking in from the gate, explaining that their beloved one was ill and had to be taken to a big hospital in another city immediately. It was at this point that I realized just how important my job was. Therefore, my life as an airline pilot is definitely not for everyone. However,my job is something I enjoy thoroughly and will continue to do till I am old enough. As a pilot, I have been able to experience so many different types of situations in different places throughout the world. For anyone interested in piloting, I would recommend going for it. The author realized how important his job was because he _ . A) could serve everyone as he does his daily work B) could make his guests' life more convenient C) could take the ill patient to hospital in short time D) had been to many advanced countries in the world
Ans: B
Ques: We would probably all be amazed if we watched a videotape of ourselves performing basically unconscious acts as we go about the business of the day. These unconscious acts consist of all the little personal habits that we don't even think about, but definitely should. These are some of the things that present an image of who we are to others, and if we are careless in performing them, this image may well be other than we would like it to be. Parents who insist that their children practice good manners and habits at home are doing them a great service, for these habits then become lifelong and the natural way they do things. It proves true that their unconscious actions will reflect a well-mannered person. People who, for example, eat with both arms on the table at home will likely do so when out. Those who are lazy and slow in private will certainly be so in public. Children who are permitted to be disrespectful to their parents will follow suit with other adults, and will, most likely, become adults who are disrespectful of others. This is an area where the saying "practice makes perfect" may be applied. There is an article about the actress, Audrey Hepburn, known for her beautiful carriage and posture. According to her biographer, her grandmother tied her neck to the back of her chair, at table, so that she would not drop down suddenly over her food, but rather would learn to put only small amounts of food on her spoon or fork and bring them to her mouth. This is a rather extreme "at home" method for the development of erect posture, but it does illustrate the effectiveness of practicing good habits so that, when in public, they are instinctive. Those who eat with both arms on the table at home _ . A) will probably change the habit when eating out with their relatives B) will probably have the same habit when they have meals in the restaurant C) will feel embarrassed when having meals with so many strangers in public D) will always put their arms on the table no matter where they eat
Ans:
B