题目

根据中文意思完成句子，一空一词。【1】了解大熊猫很有趣。It was so interesting to ___ ___ the pandas.【2】听说许多动物处于危险之中，贝蒂感到很悲伤。Betty was ____ ___ hear about so many animals in danger.【3】动物生存的土地越来越少。Animals have less and less land to ____ ___.【4】我们队很难在明天的足球赛中获胜。It's difficult for our team ____ ____ the football match tomorrow.【5】她的声音真的很好听，人也很漂亮。She has a really nice voice and she ____very ____, too.在△ABC中，角A，B，C所对的边分别是a，b，c，a2+c2-b2=12ac．（Ⅰ）求sin2A+C2+cos2B的值；（Ⅱ）若b=2，求△ABC面积的最大值．