Information and opinion gap exercises have to have some content ______ talking about.
______ he returns to his native land.
This book _____ ten units, ______ three mainly revision.
____ speaking, a person must care much about his ____, because it is not only a personal thing, but also a social one.
As we know, every four years athletes from all over the world compete ____ medals in the Olympic Games.
I am fond of music while my sister likes reading novels. It seems that we have nothing ______.