某歌手因在微博上透露交警帮其助理开道取演出服一事，被许多网友批评滥用特权，占用公共资源，对此该歌手粗口回应。后来该歌手正式就此事在微博上公开发表道歉声明，并说：“作为一个公众人物，我要时刻提高自己对社会的责任感，更加严格要求自己的言行，为社会树立一个好榜样。”对此理解有误的是（      ）

语法填空。

    Chaplin was an extraordinary performer who ____(star) in and directed many outstanding comedies. Few people were bored ____(watch) his moustache, his gestures or his entertaining reactions when chased by ____(detective). Being drunk, sliding on a banana skin or whispering his own failures to nobody, he made us feel more content ____our life without any verbal explanation. His particular sense of humor has astonished everybody throughout the world up to now.

    In a small budget film, he played a badly-off person ____(wear) worn-out shoes and ____(mess) clothes. On one occasion, he ____(trap) by a snowstorm in a vast mountainous area. He overcame many difficulties, ____ he was not fortunate enough. With all the porridge ____(eat) up, he picked out a shoe and boiled it to eat. What he performed was a total failure. According to an actress, his acting was so ____(convince) and amusing that everybody couldn't help bursting into laughter.

①A={x|y=x²+1}；

②B={y|y=x²+1，x∈R}；

③C={（x，y）|y=x²+1，x∈R}；

④D={不小于1的实数}．

其中相同的集合是（   ）