During the Gold Rush, many were gripped by an ______ desire for wealth and migrated to the West. A: allocating B: evaporating C: C. overwhelming D. illuminating

To remain __________-in domestic and international competitions, we have to strengthen the competitiveness of our products on home and overseas markets. A: illuminating B: imperative C: irreversible D: invincible

What is the author's attitude towards science A: He is depressed because of the ignorance of scientists. B: He is doubtful because of the enormous difficulties in scientific research. C: He is confident though he is aware of the enormous difficulties in scientific research. D: He is delighted because of the illuminating scientific findings.