The identity of hominid remains found in a cave in the Altai Mountains was________until Paabo and his colleagues ended the specu

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问题 The identity of hominid remains found in a cave in the Altai Mountains was________until Paabo and his colleagues ended the speculation by showing that DNA sequences indicated the bones belonged to Neanderthals.

选项 A、extraneous
B、conjectural
C、improbable
D、demonstrable
E、consistent

答案B

解析两句话的逻辑连接词为until(在……以前)，引导时间对比，对比前后取反。前半句指出，阿尔泰山脉洞穴中发现的原始人类遗骸的身份是________的，之后说帕博和他的同事结束了猜测(ended the speculation)。一件事情能够结束的前提是它必须存在过、开始过，所以空格处应该是说这个身份一直是猜测的，选B项conjectural(猜测的)。

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