问题描述：
就划线部分提问 1 He can't ride a bike beacuse he's too young.(提问 beacuse he's too young.）
2 Han Meimei 's coat is black.
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3 He often goes to school by bike.
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2 Han Meimei 's coat is black.
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3 He often goes to school by bike.
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问题解答：
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