Tom was about to close the window his attention was caught by a bird.

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编辑：chaxungu时间：2026-04-27 03:16:40分类：高中英语题库

【题目】Tom was about to close the window his attention was caught by a bird.
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【答案】when
【解析】句意：汤姆正要关窗户，这时他的注意力被一只鸟吸引住了。“Sb. was about to do sth. when ..”是固定句型，“某人正要做某事，这时突然……”。故填when。