WE SHOULDN'T USE TOO MANY PLASTIC BAGS BECAUSE THEY ARE VERY HARD...

21. - DE THI THU THPT QUOC GIA MON TIENG ANH THANG 4 2016 SO GD DT HA NOI CO DAP AN
DE THI THU THPT QUOC GIA MON TIENG ANH THANG 4 2016 SO GD DT HA NOI CO DAP AN
21. We shouldn't use too many plastic bags because they are very hard to ________.A. dissolve B. melt C. heat D. soften