All the photographs in this book, _______ stated otherwise, date from the 1950s.
#68389
A
unless
B
until
C
once
D
if
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It was quite a serious mistake, ____caused by carelessness. 
#73080
A
which I think was
B
I think which was
C
which I think it was
D
I think which it was
Mrs. Black took the police back to ______ place ______ she witnessed the robbery.
#71508
A
the same; as
B
the same; where
C
the same; that
D
as the same; as
I wonder how many years ago ___________.
#69164
A
did your father retire
B
has your father retired
C
your father retired
D
your father has retired