b) Fill in the blanks with the proper auxiliary verbs.
The White House ... located in Pennsylvania Avenue. It ... been built
as the public building in Washington, D.C. It includes many different
rooms and halls which ... filled with antiques and works of art. The public
... allowed to come during some specified hours and only to the first floor.
Ambassadors (TOCJHI) and ministers of foreign countries ... received in
the Blue Room. The Green Room and East Room ... used for public re-
ceptions. The Oval Office, in the west wing of the White House, ... been
used as the President's Office for many years.
