It is fairly common in Africa for there______ a group of expert musicians surrounded by others who also join in the performances.
#94882
A
being
B
to be
C
be
D
is
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It was a serious mistake, ______ caused by carelessness. 
#93814
A
which I think was
B
which I think it was
C
I think which was
D
that I think it was
John asked Tom ____ give him a lift to the office. 
#93583
A
if he could
B
could you
C
if could he
D
if could