What did they do to solve their problems?

A.A. They reduced the amount of waste they threw away.
B.B. They learnt to reuse things.
C.C. They learnt to recycle.
D.D. all are correct
Đáp án và lời giải
Đáp án:D
Lời giải:

Dẫn chứng: For example, they learned to reuse things—like washing out empty jars in - stead of throwing them away. And, they learned to recycle. They set up bins around town to collect glass, paper, and other things, then made into new products.

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