二、作文題（20 分） Directions: Write a well-organized essay in English with the length of approximately 200-250 words as yourresponse to the passage below.     Biotechnology has been highly developed over the past few decades. Meanwhile, it has raised manycontroversial ethical issues when it is applied to medicine, especially Xenotransplantation（異種動物間的器官移植）, namely the transfer of living cells, tissues and/or organs from non-human (animal) species intohumans, although technically, it could be the other way around or between any two species. One of the reasonsfor such developments is a worldwide shortage of organs supply for clinical transplantation. Many people diewhen waiting for suitable organs to become available. To sum up, the development of xenotransplantation canbe considered as serving several purposes: (1) to be a complete substitute for human organs; (2) to supplementhuman organs, thus easing the current organ shortage; (3) or to be a "bridge" organ before a "destination"organ can be found. Though xenotransplantation has great value to patients, besides its ethical controversies itthus raised, there are also high stakes for others concerned, such as scientists, the biotechnology industry andinfectious disease specialists.   Given the above-mentioned, do you agree to the practice of xenotransplantation if you become apractitioner of medicine?