1.Somebody has taken my briefcase
→My briefcase has been taken
2. The teacher returned our written work to us
→ Our written work have been returned to us by the teacher
3. She had finished her report by noon.
→Her report had been finished by noon
4. She bought some cups of tea to the visitors in the next room
→ Some cups of tea was bought to the visitors in the next room by her.
5.The doctor ordered him to take a long rest
→He was ordered to take a long rest by the doctor
6.They started a dancing class last week
→A dancing class was started last week
7.The mailman have already delivered the mail
→The mail had already been delivered by the mailman
8.He had to finish his work on time
→His work had to be finished on time
9.You needn't do all the homework
→All the homework needn't be done by you
10. They will send you the money at the end of the month
→ They will send you the money at the end of the month
$\text{@Vân}$
$\text{#Mong câu trả lời hay nhất ạ}$
$\text{#Chúc bạn học tốt nha}$