WE SHOULD DO SOMETHING TO ______ AIR POLLUTION IN THE CITIES. A. IN...

NHUNG DE TRAC NGHIEM HAY CO THE THAM KHAO 33 DE TRAC NGHIEM 12 HAY

Nội dung
Đáp án tham khảo

6. We should do something to ______ air pollution in the cities.

a. increase b. reduce c. conceal d. hide