1 I/ want / visit/ a castle / tomorrow 2 we/can/ meet / opposite / train station 3 you/ need / bring/money/ticket 4 you/want / see / play / theatre/? 5 we/ need / arrive /early/? 6 you/can/buy/tickets / stadium /?​

1. If my parents stay at home at weekends, I have to help with housework.

2. If my mother is at home, I do the washing up or hoovering.

3. If she isn't at home, I wash the car or work in the garden with my dad.

4. If they are at home on weekdays, I do my homework first and then go out.

5. If my father doesn't work in the evening, we play games on his computer.

And what do you and your sister do if your parents are not at home?

1. We don't do the housework if they leave the house.

2. I just lie in bed if there is nothing to watch on TV.

3.Or I chat with my friends on Skype if they feel like chatting.

4. My little sister usually plays with her best friend if she comes to our place.

5. But she doesn't know what to do if her friend can't come.

The problems of environmental protection and resource conservation are in the center of public attention. The fate of humanity depends on their successful resolution. Every year the problem of municipal solid waste becomes more and more serious. There are various methods of dealing with the waste problem, such as landfilling, disposal in technically equipped landfills, incineration and recycling. Processing is considered a more promising method. If we compare storage and incineration, incineration is less harmful to the environment. In general, wastes are products of human activity in everyday life, in transport, in industry that are not used directly in the places of their formation and which can actually or potentially be used as raw materials in other sectors of the economy or during regeneration.