—Mr. Smith, why are you always asking me to do the difficult work?—Because you _______ do such a thing and nobody else is fit for it.
Water,which seems so simple and common,is________makes life possible.
—You know,I’m poor in Chinese,you are not good at English,and... —That’s________we should help each other.
________we gave him something to eat,he would save it up for his little sister.
_______hungry I am,I never seem to be able to finish off this loaf of bread.
The magnificent tower must be saved,________the cost!