Нужно выделить трудное подлежащие.1. Many books are known to be published

Необходимо выделить трудное подлежащие.
1. Many books are known to be published in our country evere year.
2.You are supposed to graduate in four years.
3.Radium is said to be very radioactive.
4.This device was known to have been designed in h that laboratory.
5.His invention is considered to be of great importance.
6.The sun is known to represent a mass of compressed gases.
7.The new rocket is reported to go into operation next year.
8. This type of rocket is supposed to have many advantages.
9. For a long time the atom was thought to be indivisible.
10. The helium atom was found to have two electrons.
11. I did not know what i was expected to say to that, so i said nothing.
12. He was said to be one of the most promising nuclear phusicists.
13. He is said to be a good translator.