Измените текст 4C № 4 ГДЗ Spotlight Английский 11 класс Афанасьева О.В.

Change the text below into the passive. In which examples is the person who does it (the agent) not needed?
Snakes Predict
EARTHQUAKES!
Scientists in China have discovered an unusual way of predicting earthquakes - snakes! Experts are observing snakes at local snake farms to see if their behaviour changes before an earthquake. The scientists link cameras to a broadband Internet connection. They believe that the snakes can sense earthquakes from 120 km away, three to five days before they happen. They abandon their nests or even smash into walls to escape. Because frequent earthquakes strike China, scientists must find a reliable method of predicting them to avoid the terrible injury and loss of life that
they cause.

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Changing a text into the passive
•      Explain the task.
•      Ss write their answers individually.
•      Check Ss' answers.
Answer Key
An unusual way of predicting earthquakes has
been discovered by scientists in China - snakes!
Snakes at local snake farms are being observed
(by experts) to see if their behaviour changes
before an earthquake. Cameras are linked to a
broadband Internet connection (by scientists).
It is believed that earthquakes from 120 km
away can be sensed (by snakes), three to four
days before they happen. Their nests are
abandoned or even walls are smashed into to
escape. Because China is struck frequently (by
earthquakes), a reliable method of predicting
them must be found (by scientists) to avoid
the terrible injury and loss of life that is
caused (by them/earthquakes).