题目

—Why are you worried? —I’m expecting a call from my daughter. She            New for three days. A. has gone to        B. has been to        C. has been in              D. has come in 答案：【答案】A 【解析】本题考查动词时态的用法。has gone to去某地未返回；has been to曾经去过某地；has been in呆在某地；has come in已进来。由答语前半句“我正期待我女儿来的电话”可知她去纽约还未回来，故选A。下列集合恰有2个元素的集合是（　　）A．{x2-x=0}B．{x|y=x2-x}C．{y|y2-y=0}D．{y|y=x2-x}