Открыть скобки и поставить глагол в правильной форме Present Continuous или Present indefinite:
1)Who you (to send) a letter to?- To my parents.2)A friend of mins always (to tell) us interesting stories.3)Listen to him.He (to tell) an interesting story about one of the Russian acientists.4)I always (to listen) to his lectures attentively.