Chuyển các câu sau sang bị động

Chuyển các câu sau sang bị động
1.Mary types letters in the office.
2.His father will help you tomorrow.
3.Science and technology have completely changed human life.
4.Peter broken this bottle.
5.They are learning English in the room.
6.Nothing can change my mind.
7.No one had told me abot it.
8.I don't know her telephone number.
9.my student will bring the children home.
10.they sent me a present last week.
11.she gave us more information.
12.the chief engineer was instructing all the workers of the plan.