[解析]
50.A 词义猜测题.根据he is offered a seat and water at the very beginning,和…visitor must have come from a very long journey and need water.主人一开始就提供他们座位和水,游客一定来自很远的路途,非常需要水.可知:是因为他们想着这一点,认为游客来自很远的路途,需要水.故此处assumes 表示想着、认为,故选A.
51.D 细节理解题.根据 When the visitor is leaving,he is often given some food.可知当游客离开时,他们会让游客带着一些食物.故选D.
52.B 推理判断题.根据Whether he is a close friend or just a stranger,this is always how friendly Akuapem people receive a visitor.无论是亲密的朋友还是陌生人,Akuapem的人们总是友好的接待游客,故推断可知:Akuapem的人是友好的.故选B.