1.B.yes ,it can(câu it can be recycled over and over again)
2.A.glass retain its quality(câu 'the good thing about glass recycling is that glass retain its quality)
3.A.it reduces industrial poluttion( câu the first thing is that glass recycling reduces industrial poluttion)
4.A.both the invironment and ecosystem ( câu'reducing industrial poluttion benefits ..... đến but also entire ecosystem)