Câu hỏi :

Why must we save fossil fuels?

A. because the amount of fossil fuels is limited

B. because the amount of fossil fuels is expensive

C. because the amount of fossil fuels is new

D. because the amount of fossil fuels is cheap

* Đáp án

A

* Hướng dẫn giải

Dẫn chứng: The amount of fossil fuels in the world is limited. Therefore, we must save it, and at the same time we must find new sources of energy. 

Copyright © 2021 HOCTAP247