Fill in each gap one suitable word to completecthe 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 Northern Portugal, Porto is one of the oldest European centres. (2) __________ 1996, UNESCO recognised its historic centre as a World Heritage Site. Among the architectural highlights of the city, Porto Carthedal is (3)___________ oldest surviving structure. It attracts million (4)___________ tourists every year.
Rewrite sentences:
1, Unless we protect the environment, we will destroy ourselves
If______________________________________________________
2. Unless she is more hard- working, she will get low marks
If _______________________________________________________
3. Unless he listens to his parents, he will fail
If _______________________________________________________
4, They began watching the movie one hour ago
They have _______________________________________________
5, He last cried ten years ago.
He has _________________________________________________