Several musicians say they consider it the greatest musical composition ____written.

She devoted herself___to her research and it earned her a good reputation in her field.

I can ______ be a teacher. I’m not a very patient person.               

Are you paying now, or shall I ＿＿＿＿＿＿ to you? 

Bob is ________crazy about Beethoven that he knows all his works well.