Last night Dad and Mum didn’t come back home ________ I finished my homework.
#41316
A
while
B
if
C
until
D
and
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Some children ______ pictures when the teacher came into the classroom. 
#41086
A
draw
B
are drawing
C
were drawing
D
will draw
 It was quite a serious accident, _________ caused by careless driving.
#72048
A
which I think was
B
I think which was
C
which I think it was
D
I think which it was