.As reported in the essay by Prof. Brown, it is only in the most difficult circumstances ________ a man’s abilities are fully tested.

Look, here’s an English book on the desk, Is it yours?— No, it isn’t _______. It must belong to _______.

_______is your school from here?—It’s about 3 kilometers _____.

September is _____ month of the year.

This_____ my uncle and those _______ my grandparents.