1. Read the following dialogue and choose the right one in the blank.
Minho : What does the sign mean ?
Mom : It means "recycling".
Minho : What is "recycling"?
Mom : ______________________________
|
---① It's using more bicycles than cars.
② It's using old things again.
③ It's buying new things.
④ It's throwing old things away.
⑤ It's making much trash. |