The problem was settled to the plete ________ of them, so they didn't plain.A.amazementB.satisfactionC.disappointmentD.attraction
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B解析由so they didn't plain知选B项。to one's satisfaction/to the satisfaction of sb. 意为令某人满意的是，为固定搭配。amazement惊奇；吃惊；disappointment失望；沮丧；attraction吸引力。