题目解析：
【题目翻译】段落中的“adjacent”一词最接近于：
A附近的
B可用的
C暂时的
D新鲜的
【判定题型】：题目要求选出与高亮单词意思最接近的选项，故判断本题为词汇题。
【关键词定位】：根据关键词“adjacent”,定位到原句“They could have been used as feeble locomotor devices on land, perhaps good enough to allow a fish to flop its way from one pool of water that was almost dry to an adjacent pond that had enough water and oxygen for survival. ”。
【词汇解析】：词汇“adjacent”的意思是“附近的”,带入到原句中，原句的意思是“它们可能被用作陆地上微弱的运动装置，也许足够好让鱼从一个几乎干燥的水池中扑通扑通地游到附近一个有足够的水和氧气生存的水池中。”。
【选项分析】
A附近的。同义替换，正确
B可用的。不符，错误
C暂时的。不符，错误
D新鲜的。不符，错误
A second adaptation of these fish was in the structure of the lobe fins. The fins were thick, fleshy, and quite sturdy, with a median axis of bone down the center. They could have been used as feeble locomotor devices on land, perhaps good enough to allow a fish to flop its way from one pool of water that was almost dry to an adjacent pond that had enough water and oxygen for survival. These fins eventually changed into short, stubby legs. The bones of the fins of a Devonian rhipidistian exactly match in number and position the limb bones of the earliest known tetrapods, the amphibians. It should be emphasized that the evolution of lungs and limbs was in no sense an anticipation of future life on land. These adaptations developed because they helped fish to survive in their existing aquatic environment.
