с английским Use Past Simple, Past Continuous, Past Perfect or Past Perfect Continuous.

7) John ---(try) to fix his computer for 2 hours before he decided to call
the professional.

8) Alex didn't go to the concert because he -(not finish) his project.

9) Yesterday Maria (come) home at 6 p.m.,(cook) dinner and
(watch) TV.

10)This time last week he
---(fly) to Paris.

11) He (sleep) when his parents called from the country.

12) Jenny was upset because she
(fail) her History exam.

13) Rose was very tired because she
---(clean) the flat since morning.​

7) John had been trying to fix his computer for 2 hours before he decided to call the professional.
- We use the past perfect continuous tense here because it describes an action that started in the past and continued up until another point in the past. In this case, the action of trying to fix his computer had been going on for 2 hours before he made the decision to call for help.

8) Alex didn't go to the concert because he hadn't finished his project.
- We use the past perfect tense here because it describes an action that was completed before another past action. In this case, Alex's project was not finished before the concert, so he couldn't go.

9) Yesterday Maria came home at 6 p.m., cooked dinner, and watched TV.
- We use the past simple tense here because each action happened at a specific point in the past. Maria came home at 6 p.m., cooked dinner, and then watched TV.

10) This time last week he was flying to Paris.
- We use the past continuous tense here to describe an ongoing action in the past. This time last week, he was in the process of flying to Paris.

11) He was sleeping when his parents called from the country.
- We use the past continuous tense here to describe an ongoing action in the past. He was already sleeping when his parents made the call.

12) Jenny was upset because she had failed her History exam.
- We use the past perfect tense here because Jenny's failing of the exam happened before another past action or situation. She was already upset because she had failed the exam.

13) Rose was very tired because she had been cleaning the flat since morning.
- We use the past perfect continuous tense here because it describes an action that started in the past, continued for a period of time, and had a result or impact on the present. In this case, Rose had been cleaning the flat since morning, and that's why she was very tired.