Recently,few samples of mice with diabetes（糖尿病）in an experiment showed signs of recovery. Then there arose much discussion regarding the morality of such animal-testing procedures,especially since many unfortunate samples lost lives.  Is it moral and necessary to make sacrifices to benefit the majority？Or are these procedures merely an immoral and unnecessary waste of lives.
  Some people assume that it is acceptable to make sacrifices for the greater benefits because it can provide a more accurate insight to promote the progress of science. Through the test,we are able to obtain more accurate and reliable results that can lead to beneficial scientific progress to help the majority.  Scientists believe that sacrificing real animal samples can give more accurate insights compared to abstract computer modeling. For example,researchers who have conducted experiments on mice for Parkinson's disease have found more promising results which could reverse the symptoms of this previously incurable disease. Therefore,the long-term benefits are more important than the short-term sacrifices.
  However,others have argued that these acts are morally inappropriate especially since we have advanced to the point where there are more moral alternatives at present.  They believe that everything has an alternative as long as effort and money are placed. With the presence of better and more moral alternatives,there is no reason and moral room to sacrifice,even if it is for the larger benefits.
  In all,the samples' sacrifice is unavoidable due to their potential to attain great scientific progress. Research has shown that the cases having better and more moral alternatives are in rare exception,and most alternatives actually end up compromising other moral boundaries instead. However,if there exist such alternatives to some of the scientific procedures,we should try.



Why does the author use two questions in paragraph 1？ ______

A. To present diabetes.
B. To introduce the topic of the text.
C. To remind readers to focus on their health.
D. To show sympathy for the dead people.

What does the underlined word "it" in paragraph 2 refer to？ ______

A. Morality.
B. Progress.
C. Sacrificing samples.
D. Relieving the symptoms of the disease.

What can be inferred from the last paragraph？ ______

A. Mice-testing experiments are illegal.
B. There is no moral debate about animal testing.
C. Scientists decide not to use animals for experiments.
D. Researchers still have to sacrifice animals for science.

What is the best title for the text？ ______

A. Have Animal Experiments Made Progress？
B. Researches Are Fighting for Animal Rights
C. Is It Necessary to Sacrifice Animal Samples？
D. More Effort and Money Will Be Spent on Animals