4 Perhaps one of the most hazardous ways of making a living from the sea was diving for pearls.  Only the most daring would risk their lives in this profession.  The technique of pearl diving was simple. Divers attached themselves to ropes which were used to keep them in contact with an assistant on board of the ship.  Attached to a different rope were large weights which helped to speed the divers´ descent and, hence, conserve their breath for searching the seabed.  Also needed were nose clips, heavy gloves which provided protection for their hands against the sharp edges of the oyster shells, and a net in which they collected the oysters.  These nets were slung around the divers´ necks so as not to impede the usage of their hands.  When the divers signaled their intention to surface, the assistant hauled them and their load of oysters up.  The oysters were then opened and any pearls found were sifted through sieves and graded according to size and quality.  Once a widely practiced profession, pearl diving has largerly disappeared with the development of the cultured pearl.

 The author mentions all of the following as the pearl divers´ underwater activities EXCEPT

2. Although Winslow Homer (1836-1910) is best known for his realistic watercolors of powerfully dramatic seascapes, he first won acclaim in the art world as an illustrator for the reportage of the American Civil War.  This led to his illustrating texts of prose and poetry.  His more than 160 drawings reached print as lithographs, wood engravings, and photomechanical cuts.  Despite the skill and serious intent he invested in them, Homer´s book illustrations made little impact during his lifetime.  Even today, most of his illustrations are not discussed in the literature covering his work, and nearly all of them have been excluded from even the most comprehensive exhibitions of Homer´s art.

The author mentions all of the following as types of work Homer did EXCEPT

9 Medical researches have recently developed a nonsurgical method of treating heart disease that, in some cases,

6 Earth satellites transmit telephone and television signals, relay information about weather patterns, and enable scientist to study the atmosphere. This information has helped people communicate ideas and expand their knowledge. In conclusion,

5. Everything for chairs and fishing poles to rope and paper can be made from bamboo. Equally important,

10. Neurons, which cannot divide, are the basic cells of the brain. Glial cells, which can increase in number, provide support and nourishment to the neurons. It was hypothesized that if Einstein’s brain was more active in some areas, more glial cells would be found there. Indeed,

Although the animal and plants that live in the world’s various deserts come from different ancestral stocks,

Until recently, chlamydial infections cold be detected only by a complicated test that took up to seven days to complete and which was offered only by a few medical centers. As  result,

Choose the best option to complete the following sentences.

1.Glass was precious to Egyptians, who used it interchangeably with gemstones, but:

4. Children dress up in witches’ hats or goblin suits to play pranks when celebrating the ancient pagan holiday of Halloween. In contrast,