пожалуйста помогите с упр. ! Make the following sentences passive according to the pattern.

1.When she came, the washing was being done by her husband.
2.When I came to this town again, they were building a new school in front of the supermarket..-a new school was being built.
3.He entered the hall and heard that somebody was calling his name...and his name was being called by somebody.
4.As we were passing their garden, he was watering the flowers.-..the flowers were being watered by him.
5.When they entered the auction-hall, they were selling those pictures..those pictures were being sold.
6.When Father came home, I was cooking dinner.-.the.dinner was being cooked by me
7.When the guests arrived, they were still making preparations to meet them.-preparations were being still made by them to meet them/for meeting them.
8.At that moment the specialists were examining a new car.-..a new car was being examined by the specialists
9.When I came home, they were still putting books on the shelves.-..books were still being put on the shelf.
10.When I returned, the workmen were still building a new road not far from my house.-..a new road was still being built not far from my house by the workmen.
11.After half an hour I came back. They were still showing her how to use the remote control...She was still being shown how to use the remote control.
12.The lesson was almost over, but the teacher was still explaining the new rule to them-..the new rule was still being explained to them by the teacher.