A/an/the

Australia is (a/ the) smallest of the world's continents.

Northern Ireland has (the/ an) area of 14,160 square kilometres.

Do I need a Canadian visa if I have (a/ an) United States visa?

Canada is (an/ a) huge country on the North American continent.

'USA' is (a/ an) abbreviation of United States of America.

In 2019, Liverpool was (the/ an) fifth most visited UK city.              

Birmingham is (a/ an) international commercial centre of England.

Cardiff is the largest city and also (an/ the) capital of Wales.

(A/ The) Republic of Ireland shares a border with Northern Ireland.

Liverpool is (an/ a) city and metropolitan borough in Merseyside, England.