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People Watchers　　Some scientists do not wear laboratory coats (coat).And only (41)_____ (rare) do they use microscopes.These scientists are called (42)_____ (society) scientists.They want to find out how people act and why they do certain things.
Some of them study the people of (43)_____ (differ) cultures to learn their ways of doing things.They often live with the people of the culture they are (44)_____ (study).They divy to feel the world of these people.And they must be good reporters because facts, not (45)_____ (opinion) about other cultures, must be reported.
Another group of them studies how people (46)_____ (live) long ago.They dig in the ground to find old tools at have been (47)_____ (bury) for thousands of years.Sometimes, they even discover buildings hidden in the earth.
These scientists often work in (48)_____ (cooperate) with each other.If one of them (49)_____ (find) a Greek vase (花瓶) in the Middle East, he or she may ask for an (50)_____ (explain) from an expert to find out how the vase got there.