Relief work and selfless aid continues, which helps deliver needed equipment to the disas

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A. conventional
B. unusual
C. outstanding
(答案→)D. voluntary
解析：考查形容词：A．conventional惯例的B．unusual不寻常的C．outstanding杰出的D．voluntary自愿的，句意：救援工作和无私的自愿帮助在继续，这有助于运送必须的设备到受灾地区。选D。