Read the definitions and choose the correct option.​

1. The pupils ( discussed) this problem yesterday. 2. The pupils (were discussing) this problem the whole evening yesterday. 3. They  (were discussing) this problem from three till five o'clock. 4. They (were discussing) this problem at four o'clock yesterday. 5. They (were discussing) this problem when I came in. 6. She ( learnt) a poem yesterday. 7. She (was learning) a poem at five o'clock yesterday. 8. She (was learning) a poem from five till six o'clock 9. She (was learning) a poem when mother opened the door. 10. She (was learning) a poem the whole day yesterday. 11. I (did not to see) him yesterday. I ( saw) him two days ago. 12. She (was not  writing) a at seven o'clock yesterday. She (wrote) two days ago. 13. Jane (was reading) the magazine from five till six o'clock last evening. 14. He  studied) a rule in the morning last Monday. 15. Last month our team ( lost) the game. 16. what was she ( doing) when the telephone rang? 17. Whom were they ( speaking) to when I met them at the station? 18. They (were having) lunch when the telephone rang 19. Nick (was making) a report at three o'clock yesterday. 20. Mike (was writing) on the blackboard when I came into the classroom. 21. She (was not  sleeping) the whole night yesterday. 22. Who entered the room when you (were watching) television? 23. What were you ( thinking) about when I asked you a question?

Damage the computer for children is particularly high due to the fact that children often do not know the steps and sit in front of it for hours without stopping, and as the muscles of the eyes they have not yet built up, there is a serious threat to vision, the order raises the possibility that child to adulthood will be forced to wear glasses.Besides computer promotes very strong fatigue, after spending time at the computer, children can complain of headache, often irritable and moody. If parents notice negative changes in behavior after being on the computer, then the surest way to reduce the harm to the computer, it is limited in time to use. Should take regular breaks, it is desirable that the child was in the street at least once or twice a day between being at the computer. You might also have to organize the workplace:
1. The distance to the monitor at least 40-50 cm, the position of the monitor should be a few inches below the eyes, the child looked at the monitor from the top down and not vice versa.
2. The lighting in the room must be smooth, there should be no sharp light sources close to the monitor.
3. The monitor should be set up correctly, the screen refresh rate is recommended at least 85 Hz.
4. And if your child is severely fascinated sure to regularly check your computer to an ophthalmologist, in the initial phase to identify any problems with vision to later be easier to deal with them and to preserve good vision of the child.