1. More than two hundred years ago _____________.
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.
Bạn đang xem 1. - Ôn thi vào lớp 10 chuyên đề Đọc hiểu Tiếng Anh