把下列句子改为被动态,其中第7—10句必须保持主句的主语和谓语动词不变.

Is he watering the flowers?
The flowers were watered by him.
Are they going to pull down the house?
The house will be pulled down by them.
They are bound to find it out.
It is bounded to be found out by them.
You’ll have to write out the names clearly.
The names will be written out clearly by you.
We should deal with the second item on the agenda right away.
The second item should be dealt with on the agenda right away by us.
How many people is he going to invite to the party?
How many people is going to be invited to the party by him?
I appreciate your inviting my son to your party.
I appreciate my son being invited by you to your party.
We hope that they would help us in doing the research.
We hope that we will be helped by them in doing the research.
We appreciate your inviting us to your party.
We appreciate us being invited to your party.
The police believe that they will solve the crime soon.
The police believe that the crime will soon be solve by them.