【英语】将下列各句改成被动语态!

He was reading a book at this time yesterday.
A book was being read by him at this time yesterday.
The police will question the thief.
The thief will be questioned by the police.
You may write this letter in pencil.
This letter may be written in pencil.
He has sent the parel to the wrong.
The parel has been sent to the wrong by him.
不明白的再问哟,请及时采纳,多谢!

A book was being read at this time yesterday by him.
The thief will be questioned by the police.
This letter my be written in pecil by you.
The parel has been sent to the wrong by him.

1.A book was being read (by him) at this time yesterday.
2. The thief will be questioned by the police.
3. This letter may be written in pencil.
4. The parcel has been sent to the wrong (by him).
括号里的表示可以省略。
希望对你有帮助。

it's read by him at the time yesterday
the thief will be questioned by the poilce
the letter may be written in this pencil
the parel has been sent to be wrong