I happened____ it in some book.

I read about it in some book or other ,does it matter ( )it I read about it in some book or other,does it matter __ it w i read about it in some book or other,does it matter ___ it I read about it in some book or other.does it matter which i I read about it in some book or other,dose it matter______it I read about it in some book or other,does it matter_____it I read about this story in some book or other.Does it matter I read about it in some book or others for____I can to save The book may be useful to me some day so I 留着 it in my study 3.I happened____(meet)my old friend in the street yesterday. 三道英语不定式题目1.He happened____(telephone)when I went in.2.The gi is it some book?