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 It’s essential for citizens to know that the haze(雾霾.can do harm ________ people’s health.
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with
B
for
C
on
D
to
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The  roller coaster there  moved _______ high speed.
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in
B
on
C
with
D
at
Viena is       old city       the river Danube.
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A
the; in
B
an; on
C
a; at
D
an; of
The boys even have no time for their homework _________ the basketball match.
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because of
B
because
C
as
D
since
              the morning of March 31, she made an important decision in her life.
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A
Since
B
In
C
From
D
On
I go home ______5.20 ______the afternoon .
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at , on
B
from, to
C
is , on
D
at ,in