Câu hỏi:

They will destroy the forest to build a hydro power station.

 ___________ can be an excellent source of free, renewable energy for poor farmers.

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

The government has warned that Britain will face power ___________ in the coming winters.

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

The result of the exam will announce in June.

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