Câu hỏi:

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

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

In India, the demand for ___________ has always been more than the supply.

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

The result of the exam will announce in June.

 ___________ 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.