The little boy ,out of curiosity ,_______the toy to see how it worked ,but couldn’t put it together .A.took apartB.broken downC.burst intoD.knocked off
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A解析took apart拆散，broken down破裂，崩溃，分解，burst into爆发，knocked off撞到，A项符合句意：小男孩处于好奇拆了玩具想看看是怎么运作的，但是组装不起来了。