Boys and girls
It gives us great pleasure to get together here with our quest (guest) from Australia. First in(of) all,allow me,on behalf
of all the students present here,express our
warmly welcome to our quest(guest) -Mr,Jeckson.
Mr.Jackson,a headmaster of(from) Jackson High
school(School) in canberra(Canberra),has much(lots of) knowledge or(and) experience.
His school takes overseas students that some of them
are Chinese,Tomake(to make) his school better know(known).
he(He) is here not to introduce the school to us but to
tell us anything(everything) about their sysem(system) of sducation(education).
Now,may Mr,Jackson make a speech for us?
全文（包括括号里的或不包括的）我都改了，请重新整理全部。