Помогите решить тест по грамматике) 1) "Who is that man?" I don't know. I ___ him before.
a) do not see b) have not seen c) did not seen


2) I've been to Australia, but I ___ to New Zealand.
a) haven't been b) didn't go c) didn't been

3) Andew was late for school yesterday. When he got to the classroom, the lesson.
a) started b) has started c) had started


4) "How long has Sarah been living in Germany?' ____ five years.
a) Since b) For c) Ago d) before