This is to test your understanding of the articles. Chinese words are hidden so that you learn to read the English passage, then reply to see the translations.

这些中英对照的文章主要是测试你的理解能力。所以，中文翻译设了隐藏。你必须读完文章后，用英文回复，就可以看到中文的翻译了。

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I went along the passage and looked down, hidden in the archway at the top of the stairs.

我顺着过道走去，先停在楼梯上面的拱门处往下张望。

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