WE COLLECT WASTE PAPER,SCRAP METAL/AND OLD PLASTIC AND ___ THEM.(F...

411. - 500 CAU TRAC NGHIEM TIENG ANH 6 7
500 CAU TRAC NGHIEM TIENG ANH 6 7

411.We collect waste paper,scrap metal/and old plastic and ___ them.

(feed/save/burn/recycle).