UNIT 7 POLLUTION A.GRAMMAR I. CONDITIONAL SENTENCES TYPE 1. (CÂU ĐIỀU...

9. - NOI DUNG ON TAP MON TIENG ANH LOP 8 BAI 7
NOI DUNG ON TAP MON TIENG ANH LOP 8 BAI 7

9. We save thousands of trees if we (not waste) _______________don’t waste paper.