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

29. - DE THI THU DH DO LUONG
Tiếng Anh DE THI THU DH DO LUONG

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

A. people are ordered to return bottles

B. returned bottles are few

C. few bottles are made of glass or plastic

D. each returned bottle is paid