The bodies of cold-blooded animals have the same temperature their surroundings, but those of warm-blooded animals do not.

Lunar eclipses happen only if the Moon is full, but they do not occur at an every full Moon.

May I ask who was that man who was leaving the office when we came in?

From the airplane, passengers are able to clearly see the outline of the whole island

When scientists discovered how soap works, it became possible to do synthetic detergents out of Petroleum.

Nuclear energy, despite its early promise as a source of electrical power, is still insignificant in compared with older and safer energy sources.

Although he was happily married, he preferred spending lately hours at work to spending evenings lately at home

The basic elements of public-opinion research are interviewers, questionnaires, tabulating equipment, and to sample population

The threat of being dismissed do not worry me any more because I have started my own business.

Since the average age of families has fallen, therefore more and more women have been able to join the labor force

To save the California condor from extinction, a group of federal, local, and privately organizations initiated a rescue program.

The bell signaling the end of the first period rang loud, interrupting the professor’s closing comments

Somebody has stolen your bag, _    ?

To those who favorite free trade, the revival of barter can suggest nothing less than a disaster.

After the accident there was a solid line of cars stretched back for several miles

Despite of rain or snow, there are always more than fifty thousand fans at the OSU football games.

Polio, one of a group of spinal inflammations, causes fever and paralysis often resulting in disabled and deformity.

The weightlifter who allegedly took performance-enhancing drugs have been named today.

He has been hoped for a raise for the last four months, but his boss is reluctant to give him one.

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

In a new initiative announcing today, police are to take a harder line on speeding motorists.