Are these blue shoes cheap?-----yes,it is.那错了改过来
问题描述：
Are these blue shoes cheap?-----yes,it is.那错了改过来
答
问的是these blue shoes,是复数,那么回答也应该是复数.
所以是用they来指代前面的these blue shoes.
Are these blue shoes cheap?
yes,it is. -----这里改为：Yes, they are.