单选题：Ten years after the event, her death still remains a puzzle.

题目内容：

Ten years after the event, her death still remains a puzzle. A．mist
B．fog
C．mystery
D．secret

参考答案：【答案仅供学习，请勿对照自行用药等】

答案解析：

There are various ways to solve the problem.

There are various ways to solve the problem.A．same B．many C．helpful D．different

分类：理工类题型：单选题

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分类：理工类题型：单选题