Написать рассказ об одной из достопримечательности России

В. Раскройте скобки,употребляя глаголы в Present Perfect, Past Simple, Past Continuous или Past Perfect :
1. Last summer we lived in the country and went to the river every day. 
2. My sister spent a lot of money yesterday. 
3. She is so upset: she has lost the key to the front door. 
4. By the lat of September, all the children had returned from the country. 
5. Columbus discovered America 500 years ago.
6. Columbus did not know that he had discovered America. 
7. I have already read five English books.
8. He had discussed the problem with a lot of people before he took a decision. 
9. Mother has baked a delicious cake! Sit down at the table and let's eat it.
10. She was reading an English book the whole evening yesterday.

3. Fill in the gaps with the correct form of the Present Indefinite of the verb in brackets.

This block…memory, mainframe and other devices(include)

A computer programmer…the computer to do the work by writing a program (teach)

By using computer people…large amount of time in business (save)

The size of the web…on 10 per sent every month (increase)

We… in a multimedia society (live)

A computer…3 types of work: it…the information, it….and…that information, and…you the result of processing (do, receive, process, change, give)

Sometimes a computer ...(freeze).

You…RAM and video memory in megabytes (measure).

These keys…the cursor around the screen (move)