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        1. The volunteers __ a lot of help to the community for nearly ten years.
          A.offeredB.will offerC.a(chǎn)re offeringD.have offered
          D
          本題難度適中,考查現(xiàn)在完成時(shí),由for nearly ten years.可知是用現(xiàn)在完成時(shí),選D答案。
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