This egg mortality was not due to parental ageing was indicated by the similar trends taking place in pods laid by old or young

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问题 This egg mortality was not due to parental ageing was indicated by the similar trends taking place in pods laid by old or young adults.

选项 A、For this egg mortality was not
B、Why this egg mortality was not
C、That this egg mortality was not
D、Which this egg mortality was not

答案C

解析    (1)画线部分错误分析。
   本题的主语为that引导的主语从句。当主语从句位于句首时,that不能省略。
   (2)选项分析。
   在四个选项中,只有C选项是由that引导的主语从句,因此为正确答案。
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