1.Theycan'tleaveuntilthey__theirwork.
A.did
B.aredoing
C.havedone
D.hasdone
2.I__heresinceImovedhere.
A.willwork
B.worked
C.work
D.havebeendoing
3.__sixyearssinceIbeganstudingEnglish.
Atheyhavebeen
B.Itis
C.Itwas
D.Thereare
4.-Howlonghaven'tweseeneachother?
-Well,it__nearlytwoyearssincewe__last.
A.is/havemet
B.was/hadmet
C.is/met
D.hasbeen/hadmet
5.Don'tgetoffthebusuntilit__.
A.stop
B.willstop
C.stopped
D.hasstopped
6.Whenhe__allthenewspapers,hewillgohome.
A.sells
B.hassold
C.willhavesold
D.willbesold