как выполнять подобное задание?
напишите название темы, чтобы я мог найти уроки по подобному заданию.
или распишите сами, доступно, понятно, как его выполнять

Open the brackets
1. She (complete) her studies by 2009 and started her work in the company.
2. While Helen (watch) TV, Nick was studying in the next room.
3. Two new engineers (just / introduce) to the head of the department.
4. Twenty political prisoners (release) within the next week.
5. I wish I (have) a season ticket to the Philharmonic next winter.
6. If they (know) all the facts, they would have found the defendant guilty.
7. I remember (study) this piece of grammar last year.
8. I stopped (buy) a newspaper on my way home.
9. Last winter was by far (cold) we have ever had.
10. The more you study, (little) you will have to study at the end of the school year.