句子改为被动语态

句子改为被动语态
the studens are reviewing the old words with the help of the teacher.
the Korean football team beat the chinese football team again yesterday.
did the old man ride hisbicycle to the shopping center.
have you finished reading the best-seller.
you'd better not run after a dog in the busy street .
主动形式改为被动
no notice was taken of my work ,which really made me very annoyed.
all the preparations for the task have been completed,and we're ready to start.
the boy is being taught by her at the moment.
the best should be made to improve the environment.
who is the doctor going to be examined by the doctor next.
have the stories ever been told by the grandpa.
why weren't you shown around theBird's Nest by the guide last week.
one of the novels isn't being written by the yong writers.