(1) 句子结构。
本句的主要结构为主动补（SVC)，主语为Our knowledge of dinosaurs，is 为矣动词， ________部分为主语补语，which have been found here and there是 bones的定语从句。
(2)选项词义。
A. confirm v.确证；使坚定；批准
B. retain v.保留；保存
C. acquire v.取得；捕获
D. seek v.寻找
本句的大意为“ 我们对恐龙的知识完全来自各个地方发现的恐龙骨骼” 。在四个选项中， 从词的搭配来判断，与 knowledge最常见的搭配是acquire，表 示 “ 获得知识，学到知识” , 因此，acquired最符合题意。
[知识拓展]词汇拓展：acquire，leam与study。
①acquire v. to gain sth. by your own efforts, ability or behavior
e.g. She has acquired a good knowledge of English.
她英语已经学得很好了。
②leam v. to gain knowledge or skill by studying, from experience, from being taught
e.g. You can learn a great deal just from watching other players.
你只要注意看其他运动员的动作就能学到许多东西。
③study v. consider in detail and subject to an analysis in order to discover essential features or meaning
e.g. A relaxed and happy atmosphere will allow you to study to your full potential.
轻松、愉快的环境能让人充分发挥学习潜质。