IF WE GO ON LITTERING, THE ENVIRONMENT WILL BECOME (SERIOUS) POLLUT...

4- - DE VA DAP AN CHUYEN ANH THAI BINH 2010
Lớp 10 Tiếng Anh DE VA DAP AN CHUYEN ANH THAI BINH 2010

4- If we go on littering, the environment will become (serious) polluted.

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