In the sixteenth century, Francois Vieta, a French mathematician, used the vowels “a”, “b”, “c”, “o”, “u” to represent a unknown number.

The skin receives nearly the third of the blood pumped out by the heart.

Choose the best answer:

She ..................... smoking two months ago.

Tommy likes the books that he borrowed from the school library very much. He has read them with ________.

In a medical study of nearly 5.000 adults, half of them were given one aspirin a day and the other half given a placebo, it was found that those taking  Aspirin suffered 38 percent fewer heart attacks than those who weren’t.

The manufacture and production of steel was one of the industries on which the country prosperity was founded.

Composer John Cage, used many unusual objects as instrument in his music, including cowbells, flower pots, tin cans, and saw blades.

Identify the error in each sentence: New (A) sources of energy have (B) been looking for as the (C) number of fossil fuels (D) continues to decrease.

Deep cratered, the sun is over 2100 miles in diameter with negligible gravity and atmosphere.

His cell phone makes an _     noise every time he gets a text message.

If one has a special medical condition such as diabetes, epilepsy, or allergy, it is advisable that they taking some kind of identification in order to avoid being given improper medication in an emergency.

The sis Grimm intended their fairy tales to be studied by scholars of German history and not to enjoy as simple stories by children.

One decibel, which is a unit of relative loud, is the smallest amount of change detected by the human ear.

With an annual income of fifty thousand dollars a year, he can afford to give a luxurious life.

Choose the best answer:

Do you .................. me to type this letter for you?

Before bridges were built, all transport across major rivers in the area were by ferryboat.

Since we ______ to working so hard, can we rest for a while?

Choose the best answer among A, B, C or D that best completes each sentence: A …. is a person who likes reading very much.

Australian koalas are furry, gray animal that live in trees and feed on leaves.

The police set a...................to catch the thieves.

An electrical fault is believed to be to ........... for the small fire which caused the meltdown.