Children often sing this song.
错误：This song was often sung bychildren.
正确：This song is often sungby children.
Do they make those bikes in their workshop?
错误：Thoseb ikes are made in their workshop.
正确：Are those bikes made in their workshop?
The teacher gave some advice to the student.
错误：The student was given some advice to by the teacher.
正确：Some advice was given to the student by the teacher.
解析：the student是介词to 的宾语。变为被动语态时不能作为句的主语，应把紧跟在谓语后的宾语（some advice）变为句子的主语。
He usually watches TV in the evening.
错误：TVwas usually watched inthe evening.
正确：TVis usually watchedin the evening.
5.The basketball match ___.
A.is holding B.held
C.is being held D.was held
6.He was denied admittance to the meeting hallfor ___.
A.not dress well
C.not being properly dressed
D.not properly dressed
Italy’s collaboration with Libya to stop migrants reaching Europe is facing a legal challenge over allegations that it has led to grave human rights violations against those crossing the Mediterranean, including torture and slavery.【The Guardian】