Английский ЕГЭ - банк заданий - страница 72

The population of otters can indicate how ________ the environment is. The otters experienced a steep drop in numbers in the 1900s. (HEALTH)

This was because of extensive fur ________ and toxins in the water. They are not considered endangered today, though. Otters look for habitats with clean water and a lot of healthy fish. (HUNT)

Researchers look for contaminants and parasites in otter excrement. This helps ________ learn about the health of the surrounding environment and its food sources. (SCIENCE)

For example, the Elizabeth River was long considered a “dead river” because of ________. It is now flourishing. As a result, in the past five years, a great many more otters have been seen there. (POLLUTE)

Прочитайте приведённый ниже текст. Преобразуйте, если необходимо, слова, напечатанные заглавными буквами в конце строк, обозначенных номерами 19-24, так, чтобы они грамматически соответствовали содержанию текста. Заполните пропуски полученными словами. Каждый пропуск соответствует отдельному заданию из группы 19-24.

The perfect smile has created a multi-billion-dollar industry, but not all is shiny in this business. Dentists say that illegal whitening is putting people at risk of health problems, including burnt gums, lips and lost ________. (TOOTH)

Statistics show a 26% increase in complaints ________ year from people with problems from whitening. Many of them used services of unqualified specialists. (LATE)

Now we know why a dog’s nose is cold. Scientists ________ to solve this mystery for many years. The scientists believe dogs’ noses are cold because dogs sense the temperature of things without touching them. (TRY)

They use their noses to detect temperature, when prey is nearby. Earlier it ________ that dogs’ noses are cold to control their body temperature. Researchers did experiments on dogs, which had to detect the temperature of different objects. (BELIEVE)

Brain activity in the dogs showed that they ________ which objects were warmer than others. So dogs adjust their behaviour according to the thermal radiation coming from warm bodies. (KNOW)

A researcher said this ________ in the future scientists’ ideas on how animals hunt. Many animals may use heat-sensing abilities to hunt. (CHANGE)