Schools in the south tend to be better equipped,_______those in the north are relatively poor.
A sheep ______on this kind of special grass which usually grows much faster than on ordinary.
______ is a fact that English is being accepted as an international language.
I hate ______ when people talk with their mouths full.
______ is it ______ has made Peter_______ he is today?
Some people would rather ride bikes as bike ridding has______ of the trouble of taking buses.