What exactly/ the/ is/ air pollution/ of/ influence/ on human beings?

A. What exactly the air pollution is influence of on human beings?

B. What exactly the influence of air pollution is on human beings?

C. What exactly is the influence of air pollution on human beings?

D. What exactly is the air pollution of influence on human beings?

Bài tập Trắc nghiệm Tiếng Anh 12 - Unit 6: Endangered species (Writing)