Questions 11-15        In recent years, researchers in emergency rooms have been testing the effects of artificial blood substitutes such as PolyHeme and Hemopure. The development of such a substitute would    11    a significant achievement with many health benefits. Blood transfusions,    12    , would be easier and safer, as there would be no need to match blood types, and the risk of    13    viruses would be avoided as well. There would no longer be a shortage of blood in large cities or in rural areas, as artificial blood substitutes can last for two years, much longer than blood can be stored. But the    14    of this research is questionable because patients who are in need of blood transfusions in the emergency room are often unconscious and therefore do not have the opportunity to    15    to this research.
【題組】11.
(A) consecrate
(B) constitute
(C) conscript
(D) conspire
(E) consider