вычислите универсальную газовую постоянную по результатам опыта: 1 кг водорода в объеме 12 м квадратных имел давление 100кПа при температуре 300 К

1. He (to begin) to write his compo­sition atthree o'clock. It is already eleven, and he still (to write) it. He says he (to finish) it by twelve.

2. We (to help) our librarian to put the books in the right order for three days already, but we (to arrange) only half the books.

3. What you (to do) when I (to come) in?

4. When I (to come) to his house, they (to tell) me that he (to leave) an hour before.

5. On check­ing up his answers, he (to find) out that he (to make) several mistakes.

6. When I (to leave) home, the snow already (to stop), but a strong wind (to blow).

7. You (to read) this book? — Yes, I (to read) it. I (to think) it (to be) very interesting.

8. What the children (to do) now? — Oh, they (to play) the new board game which I just (to buy) for them.

9. They (to reach) the corner of the street by now and (to stand) at the bus stop.

10. After we (to walk) about two hours, we arrived at a picturesque glade covered with fresh grass.

2. Translate the sentences into Russian:

  Я уже две недели живу у друзей.

Я уже две недели жил у друзей, когда получил письмо.Сколько дней вы уже читаете эту книгу?