8.It is known to all that the World Trade Centre in New York is the highest building in the city.

7.Thomas Edison gave his whole life to bringing out the secret of nature.

6.In spite of his broken English,he finally made himself understood.

5.It turned out that only the youngest boy in our class had given the right answer.

4.Do you enjoy watching others playing chess?

3.She often goes(went) out of her way to do things for her neighbours.

2.There was so much to do.He had to stay up all night.

1.It's easier said than done.

5.Our idea is that we should do the most of work with the least of money.

What we are thinking about(of) is that we should do as much as we can with the least money possible(possible money).

What we are thinking about is that we should do as much as we can with as little money as possible.

4.The coal(that, which)we use (are using)today comes(is)from forests of millions of years ago.

The coal(that ,which)we use (are using)today was formed from forests of millions of years ago.