Every reader of this passage must spend the whole of his waking life 33________ (look) at things. Looking, like breathing, is natural; we do it 34________ noticing it. Looking is passive but seeing is active. Once you start seeing things you really begin to wake up. People 35________ see things that others have only looked at, and draw conclusions from 36________ they have seen, can add to man’s knowledge and help progress.
Someone recently discovered a place 37________ metal had been worked continuously longer than anywhere else in England. He “saw” a wall in the Forest of Dean. Thousands of people must have looked at it without really seeing it, but this man noticed that among the usual stones of that place 38________ (be) bits and pieces of a different color; they also felt different to the hand. A 39________ (close) sight showed that these pieces had been left behind in the fires of ancient peoples who had melted rocks to get metals, looking around, he found more and more information, until the history of what men had done at the place over tens of centuries 40________ (know).
looking, without, who, what, where, were, closer, was known
