water f____ about 70 per cent of an adult's bady weight

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water f____ about 70 per cent of an adult's bady weight

填:forms 组成,构成
句意:成年人体重约70%都是水.
类似的句子:
Water forms almost three fourths of the human body.
人体约四分之三都是水.
注:bady 应改为body .