(A) What we know about certain diseases (B) are still not sufficient to prevent them (C) from spreading easily (D) among the population.Đoạn văn37/80(A) What we know about certain diseases (B) are still not sufficient to prevent them (C) from spreading easily (D) among the population.Nhập câu trả lời ở đây0/3000 ký tựGiải thíchĐáp án: B