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  3. As tempting as it can be to let it all hang loose and stop worrying while on vacation, you do want to be aware of your ecologica

As tempting as it can be to let it all hang loose and stop worrying while on vacation, you do want to be aware of your ecologica

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问题     As tempting as it can be to let it all hang loose and stop worrying while on vacation, you do want to be aware of your ecological impact. Without a little planning, you may【C1】______ specific environmental and social issues in a given location. You are also inherently reliant on transportation that may be better or worse【C2】______ greenhouse-gas emissions. The synonym for the eco-savvy traveler is【C3】______.
    First of all, you should choose ecologically 【C4】______modes of transportation. This means lessening or eliminating your dependence on travel 【C5】______ that result in heavy carbon footprints. Airplanes and cars【C6】______ significant amounts of greenhouse gases to the atmosphere. Walk or bicycle as much as possible—a good method of【C7】______ yourself in your destination. Electric trains and buses are also examples of more efficient and cleaner【C8】______of mechanized travel.
    Secondly, investigate the agencies you may choose for your trip to find out their practices and reputations. Ask the company【C9】______what they do for the local community and【C10】______they run their operations. Some may contribute little economically to the area or they may【C11】______engage in ecologically damaging practices,【C12】______fuel-costly tours or excessive harassment of wildlife in the name of sightseeing.
    Thirdly, buy locally. This simple practice can have【C13】______ positive implications, both ecologically and economically.【C14】______ of food and other goods from outside the region【C15】______ a lot of energy in the form of transportation and environmental processing.【C16】______ foods that are regionally in-season and locally produced reduces 【C17】______and helps support local farmers and manufacturers.
    Finally, tread lightly on the landscape. When visiting a wild area, don’t drive or bicycle off designated routes. If camping,【C18】______ up all garbage or dispose of it in designated receptacles. 【C19】______if dispersed camping is permitted, use preexisting camps【C20】______ possible to lessen erosion.
【C4】
选项 A、effective
B、practical
C、friendly
D、convenient
答案C
解析 形容词辨析题。句意为：首先，你应该选择生态友好型的交通方式。第二段讲绿色出行需要注意的第一个方面，即选择适宜的交通方式。由于文章的主题是环保，因此应该是选择生态友好型的出行方式，故friendly“友好的”符合此处语义。effective“有效的”，practical“实用的”和convenient“便利的”，均与文章主题不符，故排除。
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