sper ca am inteles corect:
1) Pupils are teached many useful things by him.
2) Mary muste be told about our change in plans by me.
3) Machines are moved by electricity.
4) These letters should be sent by us by air mail.
5) English is spoken in many differentparts of the world by people.
6) This consonant is pronounced with aspiration by us.
7) His hospital was built 2 years ago by them.
8) The light hasn't been turned off by them.
9) All the cakes were eaten by them yesterday.
10) This work should be finished by us in time.