改成被动语态

题目

改成被动语态
they are building the new bridge
the children were talking about the film at that time
my parents bought me a new computer
someone has bought him a present
his mother has made him do the homework
people must take care of old people
you need to clean the classroom
we will hold a class meeting the day after tomorrow
he cut his hair short

答案

The new bridge is bulit by them.the file is talked about by the children at that time.the new computer was bought by my parentsthe present was bought to him by someone.He was asked to do the homework ...