6. ... he ... smoke when he was ten?
A did... use
B did... used
C did... use to
D have... used to
7. They enjoyed ... music.
A listen
B listened
C listening
D listening to
8. This museum ... by many people every year.
A was visiting
B visits
C is visited
D is visiting
9. The book ... by me yesterday
A was read
B was readed
C read
D was reading
10. How long ...you ... Jim?
A has... known
B have... been knowing
Chave...known​