1. Ecotourism is commonly regarded as low impact (影响)travel to undisturbed places. It is different from traditional tourism because it allows the traveler to become _ (educate) about the areas - both in terms of geographical conditions and cultural characteristics, and often provides money for conservation and benefits the _ (develop) of the local areas. Ecotourism has _ (it) origin with the environmental movement of the 1970s. It was not widely accepted as a travel concept _ the late 1980s. During that time, increasing environmental awareness made it desirable. Due to _ growing popularity of environmentally-related and adventure travel, various types _ trips are now being classified as ecotourism. Actually, a true eco-friendly trip must meet the following principles: • Minimize the impact of _ (visit) the place. • Build respect for and awareness of the environment and cultural practices. • Provide _ (finance) aid and other benefits for local peoples. • Make sure that the tourism provides positive experiences for both the visitors and the hosts. Komodo National Park, officially recognized in 1980, is popular for ecotourism because of its unique biodiversity. _ (activity) there range from whale watching to hiking (远足) and accommodations aim _ (have) a low impact on the natural environment.