题目内容
15．After a few years' time，Sonia could play the piano very well．分析 过了几年的时间，Sonia能够熟练弹钢琴了．
解答 答案：years'．
根据所给首字母提示结合语境推测句意是"过了几年的时间，Sonia能够熟练弹钢琴了．"，根据设空处前面的a few和后面的名词time判断设空处缺少可数名词复数的所有格形式，所填单词"年"是year，所以答案是：years'
点评 做这类题型，首先根据所给单词首字母明确句子所要考查的单词的拼写，再结合相关语法知识对单词做出形式上的变化．
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