IF PEOPLE (USE)__________ PUBLIC TRANSPORT, THERE (BE) ___________...

4. - BAI TAP TU LUAN TIENG ANH LOP 9 UNIT 7 SAVING ENERGY
Lớp 9 BAI TAP TU LUAN TIENG ANH LOP 9 UNIT 7 SAVING ENERGY

4. If people (use)__________ public transport, there (be) ___________ less pollution.