Many people, myself included, often find it difficult to write an essay introduction. Most of the TOEFL preparation books advise you to paraphrase an initial essay question, or to put it simply, write it in your own words. I have come across three different sentences (from two different articles) that suggest similar meaning and might serve as a good example of successful paraphrasing.
1. America is expected to remain the world’s pre-eminent economic and technological power for the next fifty years at least.
2. Indeed it seems to me very probable that the United States will still be the world’s most powerful nation for one or two decades yet, which, in practical terms is as far ahead as it is reasonable to make predictions.
3. But, though the position of the United States as the world’s pre-eminent power, is not likely to change, the context in which she holds that position is now certain to.