Maryis12yearsagoshewastwiceashisbrother,John.HowoldwasMarywhenJohnwasborn?要英文和中文,
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题目内容：
Mary is 12 years ago she was twice as his brother,John.How old was Mary when John was born?
要英文和中文,
优质解答
She was seven years old,她七岁
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