SORU:
Soruda boş bırakılan yere, parçanın anlam bütünlüğünü sağlamak için getirilebilecek cümleyi bulunuz.
Fragile ecosystems like the Arctic could face many more years of contamination from PCBs (polychlorinated biphenyls), despite international treaties banning their use. ----. An estimated 1.3 million tonnes of PCBs were made between the 1930s and 1990s around the world for use in the manufacture of pesticides, lubricants, and plastics. But an investigation to determine the fate of these PCBs has failed to locate most of them.
B) Indeed, soils in temperate lands have captured most of the PCBs so far released into the environment
C) On the contrary, PCBs could pose a threat to polar bears for years to come
D) That is the conclusion of a study into the fate of PCBs manufactured worldwide during much of the 20th century
E) As a result, urban air contains more PCBs than rural air
Çözüm:
A) On the other hand, PCBs may be carried by wind to cold countries where they condense out in the cold airB) Indeed, soils in temperate lands have captured most of the PCBs so far released into the environment
C) On the contrary, PCBs could pose a threat to polar bears for years to come
D) That is the conclusion of a study into the fate of PCBs manufactured worldwide during much of the 20th century
E) As a result, urban air contains more PCBs than rural air
