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

23. - BAI TAP TRAC NGHIEM ANH 9 PPT
BAI TAP TRAC NGHIEM ANH 9 PPT

23. There are ………saving methods and inventions to use solar

energy.

a. energetic

b.energize c. energy

d. energetics

b.energize