10) 1. is known to be
2. for the sake of
3. recover from
4. lost interest for
5. transmitted viruses
11) 1.A lot of years ago people used to travel by steamboat, not by plane.
2. A hundred years ago people used to pay by cash not my card
3. A long time ago people used to read a lot of books, not surf the internet
4. A hundred years ago people used to used to go to the theatre, not the cinema
