The grass needs cutting, so let us have one of the men to take lawn-mower and do it.

Developing new technologies are time-consuming and expensive.

Unlike many writings of her time, she was not preoccupied with morality.

Ancient people made a clay pottery because they needed it for their survival.

A dangerously situation was created by the bad roads.

The Commitments of Traders Report is released by the Commodity Futures Trading Commission on eleventh day of each month.

My father asked me where had I gone the night before.

Anna Robertson Moses, who was also known as Grand Moses, is considered one of the greatest female artist of US. Art.

Regarding as one of the leading figures in the development of the short story, O Henry is the author of many well- known American novels.

It is very difficult for human beings fighting pollution.

When mining for gold, you must first obtain the gold ore and then apart the gold from the ore.

Ours brains are incredibly agile machines, and it's hard to think of anything they do more efficient than recognize face.

If one type of manufacturing expands, it is like that another type will shrink considerably.

It is difficult to write rules that tell exactly when we should apologize, and it is not difficult to learn how to do it.

The teacher asked him why hadn’t he done his homework, but he said nothing.

Not everyone realizes that the most largest organ of the human body is the skin.

Doctors believe there is better in this modern world of ours to try to prevent illnesses than to rely on medicines to cure them.

It is believed that in the near future robots will be used to doing things such as cooking.

In the early 1900's, Pennsylvania's industries grew rapidly, a growth sometimes accompanied by disputes labor.

Thanks for the liberation of women, women can now take part in social activities.

Students suppose to read all the questions carefully and find out the answers to them.