AS一)比较1.The advantage far outweigh the disadvantages.2.The advantages of A are much greater than those of B.3.A may be preferable to B, but A suffers from the disadvantages that.4.It is reasonable to maintain that .but it would be foolish to claim that.5.For all the disadvantages, it has its compensating advantages.6.Like anything else, it has its faults.7.A and B has several points in common.8.A bears some resemblances to B.9.However, the same is not applicable to B.10. A and B differ in several ways.11. Evidently, it has both negative and positive effects.12. People used to think ., but things are different now.13. The same is true of B. 14. Wondering as A is ,it has its drawbacks.15. It is true that A . , but the chief faults (obvious defects )are .二)原因1.A number of factors are accountable for this situation.A number of factors might contribute to (lead to )(account for ) the phenomenon(problem).2. The answer to this problem involves many factors.3. The phenomenon mainly stems from the fact that.4. The factors that contribute to this situation include.5. The change in .largely results from the fact that.6. We may blame .,but the real causes are.7. Part of the explanations for it is that .One of the most common factors (causes ) is that .Another contributing factor (cause ) is .Perhaps the primary factor is thatBut the fundamental cause is that .三)后果1. It may give rise to a host of problems.2. The immediate result it produces is .3. It will exercise a profound influence upon.4. Its consequence can be so great that.四)批驳1)It is true that ., but one vital point is being left out.2) There is a grain of truth in these statements, but they ignore a more important fact.3) Some people say ., but it does not hold water.4) Many of us have been under the illusion that.5) A close examination would reveal how ridiculous the statement is.6) It makes no sense to argue for .7) Too much stress placed on . may lead to .8) Such a statement mainly rests on the assumption that .9) Contrary to what is widely accepted, I maintain that .五)举例1) A good case in point is .2) As an illustration, we may take .3) Such examples might be given easily.4) .is often cited as an example.六)证明1) No one can deny the fact that .2) The idea is hardly supported by facts.3) Unfortunately, none of the available data shows .4) Recent studies indicate that .5) There is sufficient evidence to show that .6) According to statistics proved by ., it can be seen that .七)开篇1) Many nations have been faced with the problem of .2) Recently the problem has been brought into focus.3) Recently the phenomenon has become a heated topic.4) Recently the issue has aroused great concern among .5) Nowadays there is a growing concern over .6) Never in our history has the idea that . been so popular.7) Faced with ., quite a few people argue that .8) According to a recent survey, .9) With the rapid development of .八)结尾1) From what has been discussed above, we can draw the conclusion that .2) It is high time that strict measures were taken to stop .3) It is necessary that steps should be taken to .4) In conclusion, it is imperative that .5) There is no easy method, but .might be of some help.6) To solve the above-mentioned problem, we must .7) In summary, if we continue to ignore the above-mentioned issue, more problems will crop up.8) With the efforts of all parts concerned, the problem will be solved thoroughly.9) We might do more than identify the cause ; it is important to take actions to .10) Taking all these into account, we .11) Whether it is good or not /positive or negative, one thing is certain/clear. 作文范文Turn off Your Mobile Phone1. 移动电话给我们的生活带来了便利2. 移动电话有时也会影响别人3. 在某些场合请关掉你的手机With the development of information technology and reduced price of communication products,the mobile phone has become a necessity for most people. Obviously, it shortens the distancebetween people and makes our life more convenient. Thanks to it, its easy for us to contact or be contacted by others anytime and anywhere. We will never miss any important meetings, great deals or admirable opportunities.But, have you noticed sometimes the mobile phone also brings embarrassment to us? Its not rare to see some pressing the mobile phone to his ear and shouting loudly in public as if there were no one else present. And Im sure each one has had such an experience that the mobile phones ring continuously on a formal occasion. Perhaps those people have life-and-death reasons to keep the phone working at all times, but it interrupts people around them who have t