Переделать предложения в PASSIVE VOISE....

Ну дальше не так же, это уж точно

Scientists in China have discovered an unusual way of predicting earthquakes - snakes! -AN UNUSUAL WAY OF PREDICTING EARTHQUAKES (SNAKES) HAS BEEN DISCOVERED BY SCIENTISTS IN CHINA

Experts are observing snakes at local snake farms to see if their behavior changes before an earthquake. -SNAKES ARE ORSERVED BY EXPERTS AT LOCAL SNAKE FARMS TO SEE IF THEIR BEHAVIOR CHANGES BEFORE AN EARTHQUAKE

The scientists link cameras to a broadband Internet connection. -CAMERAS ARE LINKED BY THE SCIENTISTS 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 BELIEVE, EARTHQUAKES CAN BE SENSED BY THE SNAKES FROM 120 KM AWAY, 3 TO 5 DAYS BEFORE THEY HAPPEN

THey abandon their nests or even smash into walls to escape. -NESTS ARE ABANDONED BY THEM (BY SNAKES) AND THEY (SNAKES) 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. BECAUSE FREQUENT EARTHQUKES STRIKE CHINA ( И КАК ТАМ СКАЗАЛИ ЧУТЬ НИЖЕ- ВЕРНО ЗАМЕТИЛИ-BECAUSE CHINA IS STRUCK BY FREQUENT EARTHQUAKES) A RELIABLE METHOD OF PREDICTING EARTHQUAKES MUST BE FOUND BY SCIENTISTS TO AVOID THE TERRIBLE INJURY AND LOSS OF LIFE THAT THEY CAUSE

дополняю: В последнем предложении первую часть тоже можно переделать в Passive voice : Because China is struck by frequent earthquakes, ..:))))

An unusual way of predicting earthquakes-snakes have been discovered by scientists in China.
Snakes are observed at local snakes farms by experts to see if their behavior changes before an earthquakes.
Cameras sre linked to a broadband Internet connection.
They believe that earthquakes can be sense by snakes from 120 km away, three to five days before they happen.
The nests are abandoned or smashed into walls to escape by snakes.
Because China are striked by frequent earthquakes, a reliable method of predicting them to avoid the terrible injury and loss of life that they cause must be find by scientists.