Tom was about to close the windows his attention was caught by a bird.A. when B. ifC. and D. till

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编辑：chaxungu时间：2026-04-27 03:02:55分类：高中英语题库

【题目】Tom was about to close the windows_______ his attention was caught by a bird.

A. when B. if

C. and D. till

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【答案】A

【解析】

试题分析：be about to do sth. when...结构，“正要做……这时……”的意思。句意：汤姆正要关窗，这时（忽然）一只鸟吸引了他的注意力。