Would youmind _________ the door —Not at all.

Jenny used to be afraid ________ in class, so she always ________nothing.

Mr. Li regards Ningxia as his second_______because he has been here for over twenty years.

I went to see Professor Johnson, only ______ that he had left the city the night before.

下列词语中加点的字，每对读音都不相同的一组是( )