(OG Authentic GRE Practice Test Section 4, Q2)
Some scientists argue that carbon compounds play such a central role in life on Earth because of the possibility of ______ resulting from the carbon atom’s ability to form an unending series of different molecules.
(A) diversity
(B) deviation
(C) variety
(D) reproduction
(E) stability
(F) invigoration
KEY: AC
关键字：because of、resulting from表示因果关系空格中应填入一个名词，与前文的possibility of构成“某某的可能性”的搭配。而这个可能性是结果，其原因在resulting from后面引导的部分中有所体现，因此依据因果关系“依因寻果”的做法，看后面有什么原因，结果发现是因为碳元素能够形成“unending series of …”，所以说，这里是“多种多样”的意思。词语解释：
[1].(A) diversity：(多样性)the condition of being diverse : VARIETY
[2]. (B) deviation：(背离)departure from an established ideology or party line
[3].(C) variety：(多样性)the quality or state of having different forms or types : MULTIFARIOUSNESS
[4]. (D) reproduction：(复制)something reproduced : COPY
[5]. (E) stability：(稳定)the quality, state, or degree of being stable: as a : the strength to stand or endure : FIRMNESS
[6]. (F) invigoration：(使……充满生机)to give life and energy to : ANIMATE
新gre填空更加注重实际运用语言能力的考察，减少了对单词纯意义的考察，所以备考新gre填空考试的考生可以根据以上gre官方指南对三空题型的解析进行备考。
