Is it in the factory__ you visited last week__this kind of car is made﹖ 
#84857
A
/;that
B
where;when
C
where;that
D
/;when
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The question that puzzled them is ____ they can get rid of the air pollution in the area.
#84871
A
how is it that
B
that is how
C
what is that
D
how it is that
I wonder        that makes him so sad.
#85248
A
why it does
B
what he does
C
how it is
D
what it is