Почему благородный онегин стал убийцей друга?

раскройте скобки,употребляя глаголы в Past Simple или Past Continuous:                   I (to play) computer games yesterday                                       

Решить систему  уравнений:

 [tex]\left \{ {\frac{2}{3a- b} - \frac{5}{a - 3b} {=3} \atop {\frac{1}{3a - b } + \frac{2}{a - 3b} =\frac{3}{5}} ight.[/tex]

Выбрать форму глаголов в прошедшем времени:

0. The girl (helped/help) the oven, the cow and the tree
1. She (work/worked) in the house of the witch
2. she (sweep/swept) the paths
3. she (dust/dusted) the furniture
4. she (clean/cleaned) the house
5. the girl (find/found) a big bag of gold
6. she (run/ran) away   
7. the witch (chase/chased) the girl
8. the oven, the cow and the tree (help/helped) the girl
9. the girl (run/ran) home