Because of the excellent preservation of the fossil, anatomical details of early

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问题 Because of the excellent preservation of the fossil, anatomical details of early horseshoe crabs were (i)______ for the first time, enabling experts to (ii)______ the evolution of the horseshoe crab.

选项 A、scrutinized...ensure
B、verified...advance
C、identified...distort
D、obscured...illustrate
E、clarified...reassess

答案 E

解析空格(i)：
- 方程等号：because of因为，同义重复。
- 强词和对应：根据题意，因为化石的完美保存，空格(i)和excellent preservation根据because of构成同义重复，体现早期马蹄蟹的构造细节第一次因为极好的保存而“获得”，填一个正向词。scrutinize仔细检查，verify证实，identify识别，obscure使模糊，clarify澄清。scrutinize的释义是to examine(something)carefully especially in a critical way，指以批评的态度进行审视，排除选项A和D。B、C、E三项合适。
空格(ii)：
- 方程等号：逗号说明前后同义重复。
- 强词和对应：根据题意，空格(ii)体现化石的保存使得专家能够“了解”进化，填一个正向词。ensure确保，advance进步，distort扭曲，illustrate解释，reassess重新评价。因为evolution是马蹄蟹自身发展的过程，无法由科学家使得其进步，排除选项B。综合空格(i)，答案选E。

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