1.They (be) to the Hermitage twice this week. 2.When your friend(return) from south?-She (return) yesterday. -You (go) to the station to meet her?-No,I(be)busy. 3.Where(be)your brother?-He just(come)home.He(take)a shower in the bathroom now.4.As soon as I(see)him,I(understand)that he(work)hard.He(write)something and(not to notice)anything

Were; when did your friend return ...; returned; did you go ...;was; where was your ...;he has just came home; he is taking; saw;understood;works;wrote; did not notice