Sheep have been domesticated for over  5,000 years ago.

The Carbon atoms of the diamond are so strongly bonded that a diamond can only be scratched with other diamond.

Glucose does not have to be digested, _______ it can be put directly into the bloodstream.

Although the Red Cross accepts blood from most donors, the nurse will not let you to give blood if you have just had a cold .

Bats use echoes of their own high – frequency sounds to detect food and avoiding obstacles.

The mayor and the council, meeting at the city hall as usual, they did not discuss the proposed new sports complex as planned.

When a simple action such as lifting one’s arm is performed, the work is divided between at least three different muscle groups.

The police officer lectured the children for ten minutes about the dangers to throw stones, but then let them off with a warning.

Society will be having to change radically to keep pace with the technology available.

Early balloonists remained aloft in the air for relatively short periods

He borrowed money_______ he could finish his education.

Food prices have raised so rapidly in the past few months that some families have been forced to after their eating habits.

Please don’t ______ a word of this to anyone else, it’s highly confidential.

_______His denial, we knew that he was guilty.

Being a child of  noble birth, his name was famous among the children in that school.

That the poverty action group was set up in the 1970s was a sign of public aware during that decade.

Thanks to a considerable number of material data, we know pretty much about ancient Egypt, but few historical records of Babylon are available.

A living polyp looks like little sea anemone, with tentacles to trap tiny animals for food.

Lewis and Clark had been gone for such long on their expedition that many thought they were dead.

Several people have apparent tried to change the man’s mind, but he refuses to listen

Psychological studies show that many students feeling terrible about the results of tests on which they have actually performed well.