◎ 题干
The volunteers      a lot of help to the community for nearly ten years.
A.offeredB.are offeringC.will offerD.have offered
◎ 答案
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“The volunteers a lot of help to the community for nearly ten years.A.offeredB.are offeringC.will offerD.have offered…”主要考查了你对  【一般现在时】【过去进行时】【过去完成进行时】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。