When do you какой глагол подставить? to be или

Просто have
Без частицы to!

1. This work will be done tomorrow.
2. Tomorrow this topic will be discussed.
3. The vegetables were bought two days ago.
4. Our errors were corrected yesterday.
5. The plate was broken last week.
6. The car Will be bought  next year.
7. 1000 houses were destroyed last year.
8. The tickets were purchased yesterday.
9. These questions are often asked.
10. Two weeks ago the Invitations were sent out.
11. After 10 minutes, we will bring the bill.
12.in Italy we will show the many attractions.
13. They were asked three questions difficult .
14.this coffee is prepared every morning.
15. Taxes have been paid . 

Russia, also officially known as the Russian Federation, is a sovereign state in northern Eurasia. It is a federal semi-presidential republic. At 17,125,200 square kilometres, Russia is thelargest country in the world, covering more than one-eighth of the Earth's inhabited land area. Russia is the world's ninth most populous country with over 144 million people at the end of 2015.
Russia has a developed, high-income market economy with enormous natural resources, particularly oil and natural gas.