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Some people say that Mars should be protected as a wildlife reserve where we do everything possible to avoid pollution, on the _______ that life could exist on it.
A.assumptionB.arrangementC.assistanceD.appointment
A               
             
试题分析:考查名词。Assumption假定;arrangement安排 ;assitance帮助;appointment委派;句意:假设火星有生命存在的话,一些人说火星应该被保护起来做为一个保护区,在这个地方做我们所能做的来避免污染。根据上文提到Mars should be protected as a wildlife reserve火星应该被保护,假定他有生命存在,所以选A项。         
考点 : 考查名词
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