题目

---Mary was being badly treated when John happened to pass by and helped her out   ---I think it was not a pure______but had been well planned.   A.coincidence    B. occurrence     C. arrangement      D. incident 答案：A 解析: 句意:---那天玛丽正受人欺负,这时约翰碰巧经过给她解了围。---我想这决非巧合，而是精心安排的。coincidence意思为“巧合的事情”，与well planned相对。occurrence偶然发生的事；arrangement安排；小事件；事变。

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