Some of the buildings that were destroyed and heavily damaged in the earthquake last year were constructed in viloatio of the city's building code.

1)Some buildings that were destroyed and heavily damaged in the earthquake last year were
2)Some buildings that were destroyed and heavily damaged in the earthquake last year had been
3)Some buildings that were destroyed and heavily damaged in the earthquake last year have been
4)Last year the earthquake destroyed and heavily damaged last year have been
5)Last year some the buildings that were destroyed or heavily damaged in the earthquake had been