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