1. The writer holds that the potential to make healthy body tissues will _______。
　　[ A ] aggravate moral issues of human cloning
　　[ B ] bring great benefits to human beings
　　[ C ] help scientists decode body instructions
　　[ D ] involve employing surgical instruments
　　2. The word “rejuvenated” ( Para. 5) most probably means _______。
　　[ A ] modified
　　[ B ] re-collected
　　[ C ] classified
　　[ D ] reactivated
　　3. The research at the University of Wisconsin is mentioned to show _______。
　　[ A ] the isolation of stem cells
　　[ B ] the effects of gene therapies
　　[ C ] the advantages of human cloning
　　[ D ] the limitations of tissue replacements
　　4. Which of the following is true according to the text?
　　[ A ] The principle of gene therapy is applicable to that of cloning.
　　[ B ] The isolation of stem cells is too difficult to be feasible.
　　[ C ] It is reasonable for all body instructions to be activated.
　　[ D ] Cloned animals will eventually take control of the world.
　　5. Towards the genetic research, the author’s attitude can best be said to be that of_______。
　　[ A ] frustration
　　[ B ] indifference
　　[ C ] amazement
　　[ D ] opposition