题目

 “Remember, your father is only one year 1 (old) than you.” That was Mum’s usual excuse when Dad said the wrong things or did something 2 (fool). Dad quitted drinking exactly one year before I was born. He joined a group of other people. He said they 3 (stop) drinking, too. I loved my dad 4  I hated the way his weekly meetings took him away 5  me. It seemed that they were more important to him than I was. But with my birthday coming up I thought Dad would make an 6 (except). “Can’t you miss it just this time? Saturday is my birthday! ” I begged him but 7 (refuse). He sai已知，且，则的最大值为       .