Garbage sorting （垃圾分类） encourages people to live_____ life than before． It makes the earth a better place to live in．（ ）
| A． |
a greener |
B． |
the greenest |
| C． |
a wilder |
D． |
the wildest |
Garbage sorting （垃圾分类） encourages people to live_____ life than before． It makes the earth a better place to live in．（ ）
| A． |
a greener |
B． |
the greenest |
| C． |
a wilder |
D． |
the wildest |
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