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#49454
A
by；on
B
from；to
C
by；to
D
in；with
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The government decided to take some action _______ the situation turned too bad.
#49281
A
until
B
unless
C
when
D
before
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#47664
A
in; on
B
at; in
C
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D
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#46505
A
in
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#47410
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at time
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#49495
A
In
B
On
C
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D
By