Every year, tornadoes cause a lot of damages to property and a tremendous lost of human and animal lives

In 1950 , it was naively predicted that eight or ten computer would be sufficient to handle of the scientific and business needs the United Stateely

Have you learnt the reason why does water of the ocean becomes blue?

Before bridges were built, all transport across major rivers the area were by ferryboa

Both Mr. and Mrs. Smith are explaining the children the rules of the game

I found it difficult convincing the ticket inspector that I had lost my ticket, and he believed me in the end

Woody Guthrie wrote thousand of song during the lifetime, many of which became classic folk songs .

He scored so good a goal that wild cheer raised from the stands

Philosophy, the quiry into the nature of human knowledge, it is still a very popular subject among university studen

- James:  "Where will you go on vacation?"           - Thomson " ______ "

It is their nearly perfect cryst structure that gives diamonds their hardness, brilliance, and transparently

The government’s budget maybe considered balanced when the amount of money it spend does not exceed the amount it receives

The Mediterranean, a large sea surrounded by land, is a mile depth the average and more than 2.000 mile

The most common  form of treatment it is mass inoculation and lorination of water sourc.

The biologist found some pollutants, a little of which be considered very harmful to fish and other living ganisms in the river.

The geology professor showed us sample about volcano rock which dated back  seven hundred years.

A majority  studentsthis university are from overseas 

There is no Oxygen in space to support the combustion of fuels as is there the air on the Earth 

The directly sources of fresh water lakes are rain, melted snow and ice.

For many years, scientists studying the effects that the sun on human skin.

Some methods to prevent soil erosion are plowing parallel with the slopes of hills, to plant on unproductive land, and rotating crops.