Sequence of tenses.
Поставьте глагол в скобках в нужную форму.

1. We knew that the problem of safety … (to be) the most important at the conference.
2. The doctor said that I … (to need) an urgent operation.
3. The lecturer explained that he … (to pay) his special attention to the results of the previous experiment at his next lecture.
4. We considered all the work … (to be completed) last time.
5. He remembered that he … (to add) water to the mixture.
6. The parents realized that their children … (to justify) all their lives in future.
7. Everyone considered that our government … (must do) anything about the unemployment.
8. He asked me what kind of explosive they (to use) in mining.
9. I didn’t believe that everything you … (to tell) me before … (to be) not true.
10. We expected that we … (to avoid) all the difficulties solving this problem.