a、What
因为首先它做关联词引导一个主语从句what caused the accident,而且它要做从句的主语
____caused the accident is still a complete mystery.
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相关问题
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________ caused the accident is still a complete mystery. A．
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_______caused the accident is still a complete mystery. A．Wh
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____ caused the accident is still a complete mystery. A．What
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_________ caused the accident is still a mystery. A．How B．Wh
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英语翻译A completed investigation into the cause of the accident
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caused the accident is
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The()she did it is still a mystery
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1.The reason (that) she did it is still a mystery.
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Everything is still a mystery,isn't it
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The number of traffic accidents caused by drunk driving is _