The factory was built in a secret place, around _________ high mountains. 
#73444
A
which was
B
it was
C
which were
D
them were
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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
I won’t forgive them for what they said, ______ they apologize.
#67642
A
so that
B
even if
C
as soon as
D
in order that