Câu hỏi:

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

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

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

When you save energy, you not only save money, you also reduce the demand for ___________ such as coal, oil, and natural gas and that is a great way to play a part in saving the planet.

Laos and Cambodia have big plans for building up to 11 ___________ on the lower Mekong.

The result of the exam will announce in June.

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