GRE Text Completion: JiJing 1373-GRE填空机经1373题 - 151420UFOXA_555KA

Recent scholarship has questioned the (i)____________ of tropical forests around the world. Archaeologists have shown, for example, that the largest contiguous tract of what was thought to be virgin rain forest in the southern Amazon had been transformed into a cultural parkland before European contact, and many of the forest islands in West Africa's savanna forest transition zone are (ii)____________ as well. A. diversity B. isolated C. naturalness D. endangered E. sustainability F. anthropogenic