I’d like to go abroad for further study, but I _____afford it.[ ]A. don’t B. wasn’t able to C. can’t

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• —Hi, Jim,_ you come to my party?—Sorry, I can't. I have to do my homework.[ ]A. can B. may C. n
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• 下图是生物圈中碳循环的示意图，下列分析不符合图中表示的信息的是[]A．图中③表示的生理过程是呼吸作用B．能量沿着食物链流动，在丁这一级生物体内积累得最多C．图中甲代表的生-八年级生物
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• 生态系统中，能量沿着食物链传递、逐级递减。[]-八年级生物
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