WHY DON'T WE KEEP OUR ENVIRONMENT UNPOLLUTED

4. - KIEM TRA 1 TIET ANH 9 20162017 BAI 8 9
KIEM TRA 1 TIET ANH 9 20162017 BAI 8 9

4. Why don't we keep our environment unpolluted?

I suggest our ...

VII. Rearrange the words to make complete sentences : (1pt)