Fill in each gap one suitable word to complete the passage:
Porto is the second largest city in Portugal after Lisbon . It ( 1 )........................ one of the major urban areas of the Iberian Peninsula . Located along the Douro river estuary in Northem Portugal, Porto is one of the oldest European centres. ( 2 ) ...................... 1996, Unesco recognised its historic centre as a World Heritage Site.Among the archi tectural highlights of the city, Porto Cathedral is ( 3 ) .............. oldest surviving structure. It attracts million ( 4 )............................. tourists every year.
1.in
2.in
3.the
4.of
1- is
2- in
3- the
4- of
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