A. the environment was polluted as much as it is today.
B. people knew nothing about environmental pollution.
C. air was polluted badly
D. people was faced with pollution.
Đáp án đúng: B
Thông tin: More than two hundreds years ago, the term “environmental pollution” was quite strange to people.
Dịch: Cách đây hơn hai trăm năm, thuật ngữ “ô nhiễm môi trường” còn khá xa lạ với người dân.
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