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