Ghi rõ lí do chọn đáp án

14.The sight of too many telephones poles ,advertising billboards,overhard power lines,or shop signs may cause ....

A.light pollution

B.Air pollution

C.visual pollution

D.sight pollution

15.Many children around the word are suffering from birth defects because their parents are ...to radiation

A.worked

B.exposed

C.expressed

D.supposed

26.The cold weather in this country often makes him...

A.sneezing

B.sneeze

C.to sneeze

D.sneezed

Chọn từ đồng nghĩa

18.Servel new botanical species have been killed in the last year because of water and soil pollution (từ botanical species)

A.Mammals

B.plants

C.insects

D.flowers