C. his daughter is smart enough to make her own choice

D. courses in areas of interest in high schools will benefit students

27. What is mainly discussed in the passage？

A. Schools should prepare students for the real life.

B. Students should spend more time discussing practical problems.

C. What students learn in school should be practiced in life.

D. Life experience is of greater importance than school education

C

My wife and I, recently driving through Arizona, stopped at a “collector’s shop” in Tucson, where many kinds of stones and minerals were on display. During the visit, we were taken into a small room where ordinary looking rocks were laid out on shelves. Had I seen them on some hillside, I would not have given them a second thought. Then the man closed the door so that the room was in total darkness and turned on an ultraviolet lamp （紫外线灯）. Instantly, the rocks showed a kind of glory. Brilliant colors of an indescribable beauty were there before our eyes：certain power had been switched on, and a hidden world came to life.

As I look at my universe and walk among my fellow humans, I have the deep belief that hidden realities are all around us：there in the physical world, and there also in the human world.

I believe, then, that my chief job in life is to switch on extra power so that I can see what my naked eyes（裸眼）, or my naked mind, cannot see now. I believe that I have to do this particularly with my human fellows. My ordinary eyes tend to stop short at those envelopes we call human bodies. But we have learned that by turning on certain power we