there _____ (be) four buildings built already in our school.是填have been 还是has been

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there _____ (be) four buildings built already in our school.是填have been 还是has been

there _____ (be) four buildings built already in our school.是填have been 还是has been
there _____ (be) four buildings built already in our school.
是填have been 还是has been

there _____ (be) four buildings built already in our school.是填have been 还是has been
如果只有这两个答案选项,那就选have been.There be句型的单复数采用“就近”原则.