Đề 12 mình đã làm rồi nên bạn tham khảo nhé:

 The primary energy source in our nation, Vietnam, is electricity. However, there could be a better option, such as solar energy, that we can pursue. Since the planet is bombarded by extreme quantities of solar energy every day, solar panels absorb it as an infinite source of energy. It's also environmentally friendly, emitting no CO2, and needs no maintenance because solar panels have no moving pieces. Unfortunately, the high construction costs will make it three to four times more costly than ordinary service energy. Optimal operation and optimum energy output necessitate year-round sunshine and can be very expensive if repairs are needed. But we could try it to protect the environment, couldn't we?