GARBAGE DUMPS IN SOME AREAS HAVE RELATIVELY LITTLE GLASS AND PLAST...

6. - DE THI THU DAI HOC MON ANH VA DAP AN
Tiếng Anh DE THI THU DAI HOC MON ANH VA DAP AN

6. Garbage dumps in some areas have relatively little glass and plastic because _______.

A. each returned bottle is paid

B. returned bottles are few

C. people are ordered to return bottles

D. few bottles are made of glass or plastic