شرکت در آزمون آنلاین انگلیسی 3 - انگلیسی 3 | آزمون شماره 11578

I called to remind him that the dog ......... twice a day.

Electricity is what we use to power things at home or at school. You can probably look around right now and see an electrical outlet or two. Everything that we plug into one of these outlets …… electricity. But where does this electricity come from? Right now we have a few ways to make electricity. Some are better than others. Scientists have been working on how to get better solar power. Solar power …… the light we get from the sun into usable electrical energy. Solar power is different from oil, gas or coal because it is a/an …… energy. This means that its source …… when we use the energy as happens with gas, for instance, which burns away. Things like wind, the sun and ocean currents are called renewable …… they won’t go away