Which of the following statements about the use of chemical agents as herbicides would the author most likely agree? A.It has become more dangerous recently. B.It is occasionally required. C.It is safe but inefficient. D.It should be increased.
Đáp án đúng: B Giải chi tiết:Sentence: "In recent years, the chemical industry has introduced several herbicides that are more ecologically sound. Yet new chemicals alone cannot solve the world’s weed problems. "