Câu hỏi:

When will the non-renewable energy sources be use up?

Will your class visit the hydro power station in Hoa Binh next week?

 ___________ energy is produced by collecting sunlight and converting it into electricity.

I'm afraid that I won't come to your house tomorrow.

Two layers of glass in the window will be stopped the heat going out.

I hope the storm won't be destroyed many buildings in the city.

The result of the exam will announce in June.