He is（ ）of an expert on international law since he has settled a lot of tough cases.
Mother and father were invited to the party, but（ ）of them came.
In form, style and theme, many of Carl Sandburg's poems resemble（ ）in Walt Whitman's collection Leaves of Grass.
Hearing aids make（ ）possible for people with hearing problems to use the telephone and even to listen to music.
Caroline could do（ ）but leave although she would have liked to stay and continue talking with him.
The committee's reduced vote was（）of lack of support for its policies.
George took a(n)（ ）job in town while he was waiting to join the army.
（）you decide to take up, you should do your best to make it a success.
（）worries me is not how to raise the money, but where to find the right people for the project.
Most of the（ ）passengers were quickly removed from the aircraft.
Last night a cargo ship collided with a tanker carrying（ ）oil.
She contradicted her boss, even though she knew it was （） for her to keep her mouth shut.
A good way to forget your trouble is to help others out of（）
The school is at a( n )（）distance from our home, that is why I often walk to school.
A successful man is （）who has the opportunity and takes it.
Swimming is my favorite sport. There is（）better than swimming as a means of keeping fit.
The subway is still under construction. It will take（）to complete.
I would say it is a point of style rather than （）of grammar.
The journalist claimed that the information came from a （） source.