There is a new problem involved in the popularity of private cars __________ road conditions require __________.
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A
that ... improving
B
which...to be improved
C
where ...improving
D
when...improving
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.----I can’t find Jack. Where did you see him this morning?----It was in his factory _______he worked.
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A
where
B
which
C
that
D
on which
We’ve booked a room in the center of town for the guests ______they can stay for three days.
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A
when
B
which
C
where
D
whom
___________ has always been expected, he has finally achieved his dream, ________ makes his parents so proud.
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A
As; which
B
Which; which
C
Which; as
D
As; as
I went to the Lincoln Memorial yesterday, _____, not surprisingly, was crowded with visitors from all over the world.
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A
where
B
which
C
as
D
what