6.47.1 Read the text and answer the questions, Why couldn't people build really tall buildings in the past?
When could people start building skyscrapers?
How did the invention of the elevator change the history of buildings?
Why did people want to build skyscrapers in cities?
Why are tall buildings called 'skyscrapers'?
How fast did the Empire State Building grow?
What can you find in the Triumph of Astana in Kazakhstan?​

1) we will walk

2) She will call you, if she has time

3) I will buy

4) I will go

5) If the class is full, we will find another one

6) won't come

7) are any problems

8) I'll(I will) ask Peter if I see him tomorrow

9) I'll go next week, if I can get a train ticket

10) If I have to, I'll complain to the manager

11) If he sees me here, he'll be very angry

12) Mary will be worried

13) If it snows this winter, we'll go skiing

14) I'll lend them some money if they ask me

15) If you visit Oxford, you'll see some interesting old buildings

(В ответах 2 и 9 тебе не обязательно использовать комму пред "If", она обычно там не ставиться, но если задание этого требует, лучше просто поставить. Это так, может просто блеснёшь умом на уроке)))

1. (Shall I see) you before you (to start)?

2. What (will he do) when he (arrives) in the USA?

3. Where (will they go) if the weather (is) fine?

4. He (will ring) me up when he (returns) home.

5. If it (rains), we (shall stay) at home.

6. She (will walk) home if it (isn't) too cold.

7. I am sure he (will come) to say good-bye to us before he (leaves) to Italy.

8. Please turn off the light when you (leave) the room.

9. If we (are) tired, we (shall stop) at a small village and (shall have) a short rest and a meal there.

10. If you (miss) the 10.30 train, there is another at 10.35.

11. She (will make) all the arrangements about it before she (flies) there.

12. Before he (starts) for London, he (will spend) a day or two in a camp not far from here.