Ⅰ. 把下列句子变成被动语态
1. We found some jewels in a box.
Some jewels were found in a box by us.
2. The teacher is keeping the pupils at school for a revision.
The pupils are being kept by the teacher at school for a revision.
3. James has left a parcel for you.
A parcel has been left by James for you.
4. You must finish the article before Friday.
The article must be finished by you before Friday.
5. They will not paint the house again next year.
The house won’t be painted again by them next year.
6. They promised Mary a new doll for her birthday.
Mary was promised a new doll for her birthday by them.
