My mother ill last week.[ ]A. is B. are C. was D. were-八年级英语

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• 地球上生物生命活动所需的能量几乎都是由植物光合作用提供的，因此可以说，地球上生物所需能量的最终来源都是（）A．化学能B．太阳能C．地热能D．植物能-生物
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