Camels in america
In the spring of 1856 a herd of camels was brought to Texas, as a result of courage (1) of Jefferson Davis, Secretary of War. It was hoped that the camels might clear up some of the transport (2) problems especially across the desert areas where water was scarcity (3), and where horses and mules suffered
severe (4). Experimentation under the command of lieutenant Beale showed that the camels were able (5) of carrying heavy loads long distant (6) without water and reach their destine (7) in good condition. Various factors, however, prevented the experiment from going on further. Horse and mule teams were badly fright (8) by camels and the outbreak of the Civil War put off the interest. Year by year the number of camels in Texas reduction (9); many of the animals wandered away;
and later, in one manner or another the herds were dispersion (10).
8. Образуйте соответствующее однокоренное слово.
Fatal frogs
Across South America one can find a vary (1) of frogs unlike those found in Europe. Apart from being different colours, such as yellow and blue, these frogs are danger (2). Some of them are so poison (3) that even touching them can be fate (4).
The Embera Choco people of Columbia have been using toxic (5) from frogs for many years in order to hunt. However, since the arrive (6) of other types of weapons in the rainforest, the art of making dart guns started to appear (7). Yet, it is still possible to find craft (8) making dart guns from the trunks of palm trees. The dart is covered with poison from the frog's skin. The poison will remain strength (9) enough to kill animals for more than a year.
About 55 of the 135 species of South American frogs are toxic. The frogs are bright (10) coloured to warn predators not to touch them. Some frogs produce toxins that are use (11) as painkillers. A number of species are bred by
research (12) in the States to investigate the possibility of apply (13) of toxins for health benefit. By licking the frog’s skin scientists can judge the level of toxins. It is not dangerous, though, as frogs in captivity grade (14) become less poisonous.
9. Выберите подходящее слово из предложенных трех вариантов.
Ants united
Ant societies (1) ___ like clockwork, without any central control. No single ant has the (2) ___ picture of the environment, but the colony is (3) ___ of reacting quickly to changes. For example, it (4) ___ to a new food source by sending out a team of foragers. The (5) ___ of a single colony can be colossal. One supercolony of the argentine ant, (6) ___ in Europe 80 years ago, stretches from Italy to Portugal and (7) ___ millions of nests. Even workers from the (8) ___ ends recognize each other as colony mates. Such social complexity is only possible because ants have the most (9) ___ chemical communication system of any animal group leading to the idea that colonies themselves are superorganisms operating like a (10) ___ body.
-
1
A operate
B fulfill
C execute
2
A integral
B whole
C global
3
A possible
B capable
C probable
4
A corresponds
B responds
C response
5
A complexity
B complex
C complication
6
A induced
B inserted
C introduced
7
A composes
B comprises
C consists
8
A opponent
B opposing
C opposite
9
A sophisticated
B complicated
C composite
10
A united
B joint
C single
10. Заполните пропуски подходящими по смыслу словами из предложенного списка.