Why does William practice every second? (Para. 5)Because no one knows __________________________.
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William sang all the time because of a pain in his neck.
A. 对
B. 错
William was rich, which could be told from his clothes.
A. 对
B. 错
People considered William mad when he responded to others’ greeting with singing.
A. 对
B. 错
People knew nothing about how William made his living.
A. 对
B. 错
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