新GRE填空增加了双空和三空题型，考察单词的用法，精确含义，和理解能力，侧重基础能力考查，因此考生在备考GRE填空时大量的训练必不可少。

(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