Употребить глагол в нужной форме. Helen already___(do) her homework Paul_____(build) his house a year ago Children__(be)

1) Helen has already done (Present Perfect) her homework. 2) Paul built (Past Indefinite) his house a year ago. 3) Children were (Past Indefinite) at school last week. 4) Last month Ron caught (Past Indefinite) a cold. 5) My mother never swims (Present Indefinite) in the sea.