◎ 题干
—What's behind the door?
—________
[     ]
A. Yes,  it is a ball.                      
B. No,  it isn't a ball.
C. There is a ball.                      
D. It's in front of the door.
◎ 答案
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“—What's behind the door? —________ [ ]A. Yes,it is a ball.B. No,it isn't a ball. C. There is a ball. D. It's in front of the door. …”主要考查了你对  【特殊疑问句】  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。