Câu hỏi :

Why should we save energy?

A. save about US$21

B. conserve the Earth’s resources

C. save money

D. save money as well as conserve the Earth’s resources.

* Đáp án

D

* Hướng dẫn giải

Dẫn chứng: Ultimately, these innovations will save money as well as conserve the Earth’s resources.

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