1. Has this letter
been signed?
2. Medical students are taught the Latin language.
3. The economic agreement has
been already concluded.
4. The goods haven`t been delivered yet.
5. The letter has been
written and printed.
6. This problem has been solved by the Russian scientists.
7. What is sold in
this store?
8. This building has been fully renovated.
9. Boxes have been counted,
they can be driven to the warehouse.
10. I am not often told about it.
11. What is produced in
this factory?
12. These books are sold in all bookstores in Moscow.
13. Books and textbooks are printed in 119 languages.
14. All economic books have been read by the students.
15. Have all the rules been memorized and understood?