Условие:
In the Survival video Stranger in the Forest, tribal people of Brazil spoke of their experiences of first contact. One man said that his father { }^{}(make) friends with three white men and then he (fall) ill. Another man explained that they { }^{} (never have) contact with diseases like measles or malaria before - although there { }4(be) diseases in the forest, they (not kill) people. He said a lot of useful knowledge about forest life { }^{} (be) lost because older tribespeople { }^{} (die). The final speaker said that his tribe { }^{} (be suffering) as a result of contact with outsiders and asked the filmmakers how they { }^{}