11.Tony couldn't go to university but______ his education through evening school courses.
A.has continued
B.continued
C.continues
D.had continued
12.It is said that Sally's been painting for years since she was a little girl,______
A.isn't she
B.hasn't it
C.hasn't she
D.doesn't it
13.-"Do you mind if I smoke" -"Well, actually,______. "
A.I'd rather you didn't
B.go ahead
C.it doesn't work
D.never mind
14.John and Sue______ computer games for hours before their parents came home from work.
A.are playing
B.have been playing
C.played
D.had been playing
15.Please give me more time;______ I shall not be able to finish the paper by next Monday.
A.meanwhile
B.therefore
C.otherwise
D.still
