Câu hỏi:

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

Will nuclear energy used by many countries in the world?

The result of the exam will announce in June.

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

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

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.