◎ 题干
Tom was about to close the windows_____ his attention was caught by a bird.
A.when B.if C.and D.till
◎ 答案
查看答案
◎ 解析
查看解析
◎ 知识点
    根据魔方格专家分析,试题“Tom was about to close the windows_____ his attention was caught by a bird.A.whenB.ifC.andD.till…”主要考查了你对  【therebe句型】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。