Mark the letter A, B, C or D to indicate the correct answer to each of the following questions.

Câu hỏi

Air pollution is a ____________of fossil fuel burning by motor vehicles, factories, aircraft and rockets.

A. product

B. example

C. harm

D. consequence

Đáp án
D. consequence

Câu hỏi thuộc Bài tập:

Ms. Dung Purple - Unit 9: Protecting the Environment - Vocabulary