从方框中选择合适的单词补全下面的短文。

have  were  is  was  are

    Welcome to our school．Six years ago，thereno library．Now，therea new one in our school．Two years ago，the gym was small and old．Now wea big and nice one．We have PE class and play sports on the playground．Last year，thereno computers rooms．Now，theretwo computer rooms．