A.studied | B.has studied |
C.is studying | D.was studying |
A.come | B.came | C.will come | D.had come |
A.have you done; finished |
B.were you doing; have finished |
C.did you do; had just finished |
D.were you doing; had just finished |
A.cleaned | B.have cleaned |
C.was cleaning | D.have been cleaning |
A.are introduced | B.are been introduced |
C.were introduced | D.had been introduced |
A.turns up | B.has turned up |
C.will turn up | D.is going to turn up |
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