THERE ARE ... SAVING METHODS AND INVENTIONS TO USE SOLAR ENERGY....

359. - 1000 CAU TRAC NGHIEM TIENG ANH ON THI THPT QUOC GIA CO DAP AN
1000 CAU TRAC NGHIEM TIENG ANH ON THI THPT QUOC GIA CO DAP AN

359. There are ... saving methods and inventions to use solar energy.

A. energized

B. energetic

C. energize

D. energetics