◎ 题干
I can't understand _______ Apple's iPad 2.
[     ]
A. why are they so mad about
B. why they are so mad about
C. how are they so mad about
D.  how they are so mad about
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“I can't understand _______ Apple's iPad 2. [ ]A. why are they so mad aboutB. why they areso mad about C. how are they so mad about D. how they areso mad a…”主要考查了你对  【宾语从句】  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。