He tried his best to solve the problem,________difficult it was.
— Has the homework been finished? — Our teacher asked you .
Looking out of the window, I saw the leaves by the wind and whirled into the air.
By the time the fire-engine arrived, the fire by the inhabitants.
— Whose money is this? — Just leave it it is. It doesn’t belong to us.
What I want to know is how to do the job better with time and people.