Complete the sentences with the correct prepositions. at, for, in, on, under, by, of 1. You're here_ last. I've been waiting for ages! 2. My cousin's staying with us ＿ now, until he finds his own place. 3. The future of that company is _ doubt because it's losing money. 4. Let's meet at 8. 00. _ second thoughts, we'd better make it 7.15 so that we have time to get the tickets. 5. I was _ the impression that it was going to rain today. 6. Sorry I'm late . I got on the wrong bus _ mistake. 7. _course she'll be upset if you don't go to her party. You're her best friend.

1. A spreadsheet doesn't store data values in cells.

Does a spreadsheet store data values in cells?

2. Databases don't involve a higher level of technical processing.

Do databases involve a higher level of technical processing?

3. He didn't establish the relationships between databases.

Did he establish the relationships between databases?

4. The programme won't be compiled in a few days.

Will the programme be compiled in a few days?

5. A database wasn't programmed to show only certain information.

Was a database programmed to show only certain information?

6. Some databases aren't run on servers and accessed over networks.

Are some databases run on servers and accessed over networks?

7. Cells don't contain numbers, text or formulae.

Do cells contain numbers, text or formulae?

8. They didn't use spreadsheets to calculate totals, percentages, discounts.

Did they use spreadsheets to calculate totals, percentages, discounts?

Объяснение:

ответ: It’s a common truth that the world has completely changed with the expansion of technological progress. Nowadays, people have a lot of things they couldn’t even dream of one or two hundred years ago. One of such gadgets people can’t imagine their life without is a mobile phone. So why is it so important for people of the modern world?

First of, mobile phone is a mean of communication. It helps people to keep in touch with their friends and relatives at any distance. Moreover, connection to the Internet allows using different social networks and special apps like Viber, Skype or WhatsApp to make usual calls, video calls and exchange instant messages wherever we are. Additionally, this mean of communication enables us to make business quickly and effectively. You can check your e–mail and organize any meetings, pay bills and do many other useful things just with one button click.