SCIENTISTS HAVE BEEN LOOKING FOR SOLUTIONS FOR DECADES TO PRESERVE...

20. - DE THI - DAP AN_thi HK2 tieng anh 10 chuan-2019-2020
Tiếng Anh DE THI - DAP AN_thi HK2 tieng anh 10 chuan-2019-2020

20. Scientists have been looking for solutions for decades to preserve the earth‟s limited fossil fuels

from depletion.

A. conserve B. protect C. maintain D. Destroy