Question

ajutorrrrrrrrrrrrr ajutatima la engleza si rezolvati exertitiul:
Before the mechanic (to install) the new equipment he (to examine) it thoroughly.
After Cornel (to write) the poem dedicated his mother, he (to read) it to his elder brother.
Andy (to buy) this book in the best book shop of our town.
When I (to enter) the classroom, the student on duty (to clean) the blackboard.
When Alina (to enter) the classroom, the teacher (to start) already the lesson.
While I (to do) my homework, my younger sister (to draw) a picture.
By the end of the week Cornel (to finish) the work in the garden.
Yesterday I (to watch) an interesting movie on TV.
Yesterday by 2 p. m. all my classmates (to leave) school
Victor told his friend that he (to help) mother about the house
After the children (to read) the book Robinson Crusoe they (to discuss) it in class.

Answer 1

1) installed/examined.
2) had written / read
3) bought
4)entered/was cleaning
5) entered/ had already started
6) I`m doing /sister is drawing
7) have left
8)he is helping 
9) children had read/ they discussed it