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问题描述：

[单选] He was very reluctant to tell his parents everything he knew．他主动告诉警察他所知道的一切。（）
A．正确 B．错误
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上一篇：下列关于生物与环境的关系中，叙述不正确的是（） 下一篇：He still went ahead with the experiment， even though he knew it was dangerous．即使知道有危险，他仍然继续实验。（）

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