题目内容
【题目】Tom was about to close the window his attention was caught by a bird.
【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。
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题目内容
【题目】Tom was about to close the window his attention was caught by a bird.
【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。