грамматика форма глаголов 1)Todd is a very good student ,isn't ___?
1.he
2.him
3.his

2)Penelope _ on her homework when the doorbell rang.
1.worked
2.was working
3.working

3) the teacher tells your her students ,who promise they_ quietly for three hours, that she won't give extra assignments
1.would study
2.studied
3.study
4.have studied
5.will study​