Write questions for these answers with how long and the present perfect. 1. they've been in class for 15 minutes. 2. he's known john since he was at primary school. 3. mary has worked in miami since for one year. 5. my mother has had a motorbike since last year. 6. they've studied chinse for two years.

1. How long have they been in class?
2. How long has he known John?
3. How long has Mary worked in Miami?
5. How long has your mother had a motorbike?
6. How long have they studied Chinese?

1)All progressive people( fight) for peace.
2)When was the radio( invented)?
3)When was ,,War and Peace,, (written) by Tolstoy?
4)Chemically pure water is never ( met) with in everyday life.
5)Much attention(is paid) to the living condiyion of people in our country.
1)My sister(was invited) to the birthday party by her friend yesterday.
2)More and more houses(are build) in our country from year to year.
3)We( open) the window after every lesson.
4)We(will finish)our experiment in a week.
5)Young trees(were plant)in the street last autumn.
6)I( answered)my brothers letter last week.

Every year schoolchildren have their winter holidays. They usually last for 2 weeks: from the New Year’s Day till the 12th of January. I am sure that all of us look forward to this time because it’s a great chance not to get up early and to do what we want. As for me I always sleep till 9 a.m. during my winter holidays. Then I turn on my TV and lie in my bed for another hour.Winter holidays are even more exciting because we celebrate New Year and Christmas. Our mood is joyful. The whole atmosphere is full of magic. People exchange presents, decorate their homes, cook delicious food, visit each other and have parties.If the weather is cold I prefer to stay at home or visit my friends. They can also come to my place. We play computer games, surf the Internet or watch TV. The programmes on TV are really interesting during our holidays, so we watch plenty of cool films. In warm weather we go to the cinema or a café, play ice-hockey or go skiing to the park. Hockey and skiing are my hobbies. We can even play snowballs and make funny snowmen.In the evening my mother often asks me to help her about the house. My duty is washing up, watering plants and taking the rubbish out. As I don’t have to get up early during my holidays my parents allow me to watch TV and read books till midnight.I enjoy my winter holidays. It’s a nice time to relax and take a short rest from my studies. It’s a pity that winter holidays always pass so quickly.