Philadelphia is an important university centre with many fine cultural buildings. Нуууууу я думаю так
Удачи в ДЗ!!!!
1) we return to the hotel after lunch.
2) in case of rain you need an umbrella.
3) the book that I have finished reading.
4) i have a christmas party.
5) this chocolate cake was delicious.
6) when we met we talked for an hour.
7) I can not come to your country.
8) there was an accident when she was at work.
3. The telephone rang while I was having a shower.
5. I know that when I leave school, I will work for my family's company.
6. I think that we will probably win but you never know.
7. I can't talk now, I will be having a meeting with Marion in ten minutes.
8. If you don't switch off the computer properly, you will have problems.
Am в 1,5
Are в 3,4,7,8,10,12
Is в 2,6,9,11,13,14