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

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

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I suggest our (environment should be kept unpolluted? ...

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