题目

Two middle-aged passengers fell into die sea, ______ , neither of them could swim.  A. In fact   B. Luckily  C. Unfortunately   D. Naturally     答案： C in fact 实际上；luckily 幸运地是；naturally 自然地；unfortunately 不幸地。从所给的情景neither of them could swim 可以判断，他们都不会游泳。  

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