---Tom studies hard.Mary studies even harder.Jack hardly studies.Of the three, who studies the hardest? ---___ studies the hardest.
The question is ____ of great importance.
Yes,___ is difficult to find a job nowadays, but ____ is more difficult is to try to find such a job with a high salary but little work to do. A it ; it B. what ; what C. it ; what D what ; it
Some of the people had ____taken up their arms.
The post office is two _____away.
. —I usually go there by train. —Why not ____ by boat for a change?