题目

用方框中所给单词的适当形式填空。每词仅用一次，每空不限填一词。 seat our until lend wise 【1】The talent show will start in five minutes, boys. Please take your ________quickly.【2】Our parents don’t worry about us, because we can look after _________when we are alone.【3】On October 1st, my family watched the National Day Celebration on TV _____ it was over.【4】You need to read more books and study harder if you want to be ______ than others.【5】Tony_______ some useful books to Sally so far and tried to help with her English project.（2012•潍坊二模）如图，已知F（2，0）为椭圆x2a2+y2b2=1（a＞b＞0）的右焦点，AB为椭圆的通径（过焦点且垂直于长轴的弦），线段OF的垂直平分线与椭圆相交于两点C、D，且∠CAD=90°．（I）求椭圆的方程；（II）设过点F斜率为k（k≠0）的直线l与椭圆相交于两点P、Q．若存在一定点E（m，0），使得x轴上的任意一点（异于点E、F）到直线EP、EQ的距离相等，求m的值．