5 ĐIỂM(SUGGESTION) THE SUN IS AN EFFECTIVE SOURCE OF POWER. IT IS CH...
2.5 điểm(Suggestion) The sun is an effective source of power. It is cheap and it does not cause pollution. It can be stored for a number of days. We can save our natural resources by using solar energy instead of gas, oil andcoal. Therefore, a lot of countries in the world have already used the solar energy.Test XIQuestion 1