INTERCHANGE 3 - UNIT 7 PASSIVE WITH PREPOSITIONS
UNCONTROLLED DEVELOPMENT HAS THREATENED ANIMAL HABITATS. (AS A RESULT OF)
ANIMAL HABITATS HAVE BEEN THREATENED AS A RESULT OF UNCONTROLLED DEVELOPMENT.
UNTREATED SEWAGE IS CONTAMINATING RIVERS. (BY)
RIVERS ARE BEING CONTAMINATED BY UNTREATED SEWAGE.
THE AIR POLLUTION HAS AFFECTED THE HEALTH OF MANY PEOPLE. (DUE TO).
THE HEALTH OF MANY PEOPLE HAS BEEN AFFECTED DUE TO THE AIR POLLUTION.