2016年1月9日
一、综合写作
Dental amalgam
牙医们使用水银(mercury)，应该禁止使用
阅读：
1.水银对人体有毐;
2.牙医治疗过后的垃圾(waste)会对环境造成污染;
3.可以用金(gold)之类的贵金属代替水银。
听力(refute the reading)
1.用量很小，不至于引起危害，即使是有危险也为过敏(allergic)而不是中毒;
2.有一种设备可以分离(seperator)重金属并安全的扔掉垃圾。而这种设备可以在湿的坏境(in wetsituation)下使用，很耐用;
3.別的贵金属因为太贵了，如果要使用会非常花钱。
一、独立写作
Some people think it is the best approach for students tolearn if school start the day at a early time in the morning. But someone think theschool should start the day at late time. Which one do you prefer? Use specific reasons and detailed examples to support your answer.
Many schools areplanning to postpone the first class in the morning for less lateness andbetter educating quality. However, the schedule of late classes willcultivate students' indolence, and pose many other negative effects.
As a result, starting class late would noteffectively reduce the rate of lateness and cannot secure the educating efficacy.
Firstly, early classesin the morning will force the students to keep a disciplined life style. In order to attend the first class, sludents have to get up early in the morning. Thishabit brings many benefits.
For example, young people will live a much healthier life. Keeping the schedule in mind,they would no longer dally at night before sleep, and save their time in the morning.
Then, they can have a good rest in tlie evening and keep themselves energetic at daytime.Besides, they could also shape many of their excellent characteristics, like selfdiscipline orpersistence.
Leaving the cozy bed requires a powerful willpower when we start a i>ewday, and doing this ever)' day asks for a strong self-control. Both of these virtues are keys to success. And oneof the well-known,Kobe Bryant, is a beneficiar of starting his day early in the morning.
Heonce gave his secret to become the MVP in the basketball playground. It was his getting up early in the4 AM that contributes him. In conclusion, both physical and psychological benefits can begained by the disciplined life style led by the early classes.
In addition, earlystart in the morning also leaves more extracurricular time for students.Earlier starting class generally results in earlier olT-class. More spare time afterclass enables students to conduct other activities, such as further exploring in study, deepening theirinterests or doing some other activities.
Those activities would help students to improve tliemselves.In spare time,students can do some practical experiments to apply knowledge into practice,which allow them to have in-depth understanding in knowledge leamt in class.
Students would be alsocapable of learning instrument, painting or doing sports with abundant of time afterclass. Those extracurricular activities lielp students to achieve complete development.
Obviously, earlier start in the morning means a longer day, providing more spare time for students toenrich their life and promote tliemselves in learning.
Late classes, to adegree, may lower the absence rate at the beginning. This isbecause that students do not need to be hurry in the morning, especially for those who cannot get up early.
In the long run, however, the original purpose cannot be realized effectively. The allowance of starting class later would indulge the bad habits of procrastination. Some students will tend to put off all tasks late at niglit, if they do not need to get up early.
Staying uplater would in turn make students get up later. This is a vicious circle. As a result, students'biological clock will be re-adjusted, making it harder for them to get up on time. Therefore, theabsence rate would be decreased again.
In summary, comparedto making classes late in the morning, starting the day early would bring many benefits in learning.
Students would be able to maintain a healthy lifephysically and mentally, and to explore in siudy, all of which contribute to a higher qualityof learning.
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