Câu hỏi:

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

The result of the exam will announce in June.

There are many available ___________ power sources in Vietnam including sun, wind, water, etc.

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

Will nuclear energy used by many countries in the world?

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

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