Choose the letter A, B, C or D to complete the passage below
Air pollution is one of _________ (6) problems of the current time all over the world. There ___________ (7) a lot of reasons for this pollution. First of all, the release of air pollutants such as smog and solid materials cause air pollution and health issues ___________ (8) human. ___________ (9) dirty wastes in big cities are polluting the whole atmospheric air. Thirdly, motor vehicles are releasing polluted gases contributing to the air pollution. Finally, some natural ________ (10) like dust, soil particles, and natural gases are also the source of air pollution.
Question 6:
A. serious
B. more serious
C. the most serious
D. serious than
Chọn đáp án: C
Giải thích:
cấu trúc “one of the most + adj dài + Ns”: một trong những ….
Dịch: Ô nhiễm không khí là một trong những vấn đề của thời đại hiện nay trên khắp thế giới.
