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A. its technique is not good enough
B. it is immoral and leads to wrong expectations
C. it may lead to parents’ unnatural behavior to the copy of them
D. it may lead to many people’s unemployment
17. Which of the following words can be used to replace the word “well” in Para. 1, Line 5?
A. easily
B. as one would wish
C. quite possibly
D. skillfully
18. In breeding copies of selected livestock, scientists should take consideration of all the following aspects EXCEPT _________.
A. the balance between extreme selection of livestock and continuation of genetic variability
B. ill-treatment of the copied animals
C. preservation of frozen cells
D. intense opposition to animal cloning
19. What do you think would be described /dealt with in the next paragraph of the passage?
A. The strategies to modify pigs genetically.
B. People’s response to the proposals above
C. The immune system
D. Another potential medical application of cloning
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