Помогите раскрыть скобки, поставить глагол в нужный залог и время My sister (to invite ) many friends to her birthday party yesterday. My sister (to invite ) to the birthday party by her friend yesterday. We (to open) the windo...

Помогите раскрыть скобки, поставить глагол в нужный залог и время My sister (to invite ) many friends to her birthday party yesterday. My sister (to invite ) to the birthday party by her friend yesterday. We (to open) the window after every lesson. This question not (to discuss) at the radio (to invent? Tchaikovsky (to use) folk songs in compositions. The letter (to send) yesterday?