下列词语中加线的字,每对读音都不相同的一组是( )

This is the first time that I ___________ at the meeting.

There was a(n)________silence in the live interview，when no one knew what to say to the audience.

81 Male and female students are quitedifferent from each other ______ the age at which they begin to develop anintellectual self-discipline

_____it with me and I’ll see what I can do.