So many uses have been discovered for this wood ____ the supply of white pine is becoming smaller and smaller.
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A
then
B
what
C
that
D
which
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___ difficulty you may have, we will always fight along with you.
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A
What
B
How
C
Whatever
D
However
The exciting news has spread all over the world______the satellite around the moon succeeded in returning to the earth.
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A
which
B
that
C
whether
D
what
19.They talked about things and persons ___ they remembered in the school.
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who
B
which
C
that
D
what
But when I got _______ the town ought to have been, all I found was a gas station．
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A
where
B
which
C
what
D
that