题目

用方框中所给单词的适当形式填空，使短文完整正确。（每个单词限用一次。每空填一个单词。） Sing beautiful tell work play one improve good success canOnce there was a piano player in a bar. People came just to hear him 【1】. But one night, a lady asked him to sing a song.“I don’t sing,” said the man. But the lady 【2】 him, “If you want to get paid, sing a song!”So he did. He never sang in public before. Now he was singing for the 【3】 time! And everyone was surprised to find that he sang so 【4】!He had talent he was sitting on! He mig（本小题满分12分，（Ⅰ）问5分，（Ⅱ）问7分） 已知以原点为中心的椭圆的一条准线方程为，离心率，是椭圆上的动点。 （Ⅰ）若的坐标分别是，求的最大值； （Ⅱ）如题（20）图，点的坐标为，是圆上的点，是点在轴上的射影，点满足条件：，，求线段的中点的轨迹方程。