Поставте пожалуйста предложения в Passive Voice.

1) He had told us a lot of interesting things by that time. - A lot of interesting things have been told us by him by that time.- We have been told a lot of interesting things (by him) by that time.
2) The waiter is picking up the broken plates.- The broken plates are being picked up by the waiter.
3) We have already made the plan. - The plan have already been made by us.
4) The writer will publish his novel next year. - This novel will be published by the writer next year.
5) Somebody built this castle in the 16th century. - This castle was built in the 16-th centrury.
6) We grow wheat here.- Wheat is grown (by us) here.
7) They were showing the film from 7 till 8. - The film was being shown from 7 till 8 (by them.)
8) The students make a lot of mistakes. - A lot of mistakes were made by the students.
9) She is typing the letter at the moment.- The letter is being typed by her at the moment.

согласна с предыдущим ответом, однако The plan has already been made by us (3 лицо ед число)

A lot of interesting things had been told by him by that time.
The broken plates are being picked up by the waiter.
The plan have been already made by us.
The writers` novel will be published by him next year.
This castle was built by somebody in the 16th century.
Wheat is grew here by us.
The film was being shown by them from 7 till 8.
A lot of mistakes are made by the students.
The letter is being typed by her at the moment.