仔细阅读下面五个句子，然后用下面方框中所给的单词或短语填空，使每个句子在结构、意义和逻辑上正确。(提示:选项中有一个是多余的。)

Mark Twain is Mary’s __________ author.
I ________ classical music to pop music.
The Fine Arts Museum is both ______ and interesting.
I ______ eating ice cream on a hot day. There’s nothing better.
Do you know where John is? He was going to meet me earlier but he didn’t ___________.