题目

用方框中所给单词的适当形式填空，使对话通顺、正确，每词仅用一次(每空一词) minute convenient cook experience believe Lily:Ann, how do you feel about this dish?Ann:It is very delicious.Lily:Quite right. It was by a special cook.Ann:He must be a famous and cook.Lily:He is not a human being but a robot.Ann:A robot cook? I can't it.Lily:It is true. This robot is developed by an old man in Beijing. You just need toput food inside the robot and carry some orders out.Aftera few a delicious dish is finished.Ann:It sounds really easy and .Lily:Yeah, the old m已知点P（a-1，5）与Q（2，b-1）关于x轴对称，则（a+b）=________．