SCIENTISTS ARE LOOKING FOR AN... WAY TO REDUCE ENERGY CONSUMPTION...

209. - 400 CAU TRAC NGHIEM GIUP ON TAP TIENG ANH LOP 9
400 CAU TRAC NGHIEM GIUP ON TAP TIENG ANH LOP 9
209. Scientists are looking for an... way to reduce energy consumption.A. effect B. effection C. effective D. effectively