___ ENERGY CAN BE CHEAP AND CLEAN.(SUN/ SUNNY/ SOLAR/ SOLARIZE).

4. - BO DE THI THU VAO LOP 10 MON TIENG ANH NAM HOC 2017 2018 CO DAP AN SO 3
Lớp 10 Tiếng Anh BO DE THI THU VAO LOP 10 MON TIENG ANH NAM HOC 2017 2018 CO DAP AN SO 3

4. ___ energy can be cheap and clean.(Sun/ Sunny/ Solar/ Solarize).