Our teacher said people used to say the earth _____(be)not round

问题描述:

Our teacher said people used to say the earth _____(be)not round

Our teacher said people used to say the earth ___was__(be)not round
我们老师说人们过去说地球不是圆的.为生么用WAS,我将选你过去说的,发生在过去。地球不是圆的,是错误的观点,不是客观真理,所以不用is