In 1971, readers around the world were astonished by some photographs which appeared in newspapers. Hidden deep in the rainforests of an island in the Philippines, was an ethnic (种族的) ___1___ called the Tasaday. Not until that moment did anyone have any ___2___ of these people. They didn’t have an agricultural economy; they hunted animals and __3___ fruit from the plants in the rainforest.
