1. Переписать предложения в нужном грамматическом времени.
-Present Simple (настоящее время, действие происходит обычно),
-Present Continuous( действие происходит сейчас be+Ving)
- Past Simple (Il форма время).
1(you/cook) dinner yesterday?
2. My sister (go) to shopping twice a week.
3.We...(not/have) English last week
4. Mory...(boke) muffins at the moment
5. Tom...(not/ eat) spicy food.​

The Sun is an effective source of energy for distant areas with undeveloped infrastructure. Solar energy can be used for charging batteries during the day. Some  cities use the solar-powered street lights in motoway tunnels that are far away from the usual power plant.The solar power is unlimited and doesn't pollute  the environment . Nonetheless, using the batteries as a storage for energy  is quite expensive. That's why it's still important to develope the solar energy transforming as a form of power for infrastructures.

Areas with no source of electricity remain in darkness until the
comes up, because street lights need a power supply. British firms offer new appliances, such as solar-powered street lights. They work by using energy accumulated during the day from a solar panel. The batteries are being charged during the day and then it's power is used for lighting. The system can be used for one individual light or a number of them. In the south of Saudi Arabia a motorway tunnel miles from any power supply is lit day and night by solar-powered devices. The advantages of sun-powered lamps are
that they can bring light to areas distant from any other power supply and that they do not pollute the environment.