题目

二次函数y＝ax2＋bx＋c的图象如图所示，则一次函数y＝ax＋b与反比例函数y＝的大致图象是(   )    答案：C— Why do you look so worried? —My computer broke down and my essay ______ unfinished since.A．had leftB．has been leftC．has leftD．was left