问题描述: two fish men said they had ever seen __UFO .A.the B./C.an D.a 1个回答 分类:英语 2014-11-29 问题解答: 我来补答 UFO U 的音标是 /ju:/,是辅音音标开头,应该用a并且UFO是初次出现所以选D 展开全文阅读