Make the sentences negative and then interrogative: 1.there are foreign newspapers on the table.2.there will be a lecture at out institute tomorrow.3.there was a concert in the hall yesterday.

1.There aren't foreign newspapers on the table. Are there foreign newspapers on the table?
2.There won't be a lecture at out Institute tomorrow. Will there be a lecture at out Institute tomorrow?
3.There wasn't a concert in the hall yesterday. Was there a concert in the hall yesterday?

ответ:      1. We escorted him to the airport.

2. We had to stop our trip because we ran out of gas.

3. She wanted to wear a new dress.

4. I don't like to put things off.

5. The conference was canceled at the last moment.

6. I'll look it up in the dictionary.

7. He filled out the form and signed it.

8. He decided to continue the lecture.

9. We all asked him to stop Smoking.

10. I just tried on these shoes. It's not my size.

11. She turned off the TV because the children hadn't learned their lessons yet.

12. The old man asked everyone to speak up.

13. The police officer signaled to stop, but the driver kept driving.

14. Don't forget to return the disk you took from your friend.

15. The boy said that he wanted to enroll in the tennis section.

16. Winter came. It's time to put away the summer things.

17. Old people often remember the past and are sad.

18. It is very important to extinguish the fire in the first minutes.

19. I couldn't turn on the TV because I forgot to plug it in.

20. Never go back to where you were happy.

Объяснение:

1. Is the USA a federal republic? - общий

2.  Is the USA is a federal republic of 50 or 49 states? - альтернативный

3)  The state of Alaska is at the north, isn`t it? - разделительный

4) What is Washington? - специальный

5) Where is the District of Columbia located? - специальный

6) What is District of Columbia mean? - специальный

7) The United States contains a highly diverse population, isn`t it? - разделительный

8)  Who is surviving native Americans? - вопрос к подлежащему

9) Who have gone to America hoping for greater social, political and economic opportunities?  - вопрос к подлежащему

Объяснение: