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They sometimes go on working ____ the light of the moon.
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A
on
B
under
C
by
D
for
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When Tracy was told her son's illness could be cured, she left the hospital        ．
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A
in peace
B
in surprise
C
in time
D
in relief
Heavy smog blankets Beijing．        ,city authorities start using its new smog warning system．
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A
In turn
B
In time
C
In response
D
In return
 It was foolish ________ you to give up what you rightly owned.
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A
for
B
of
C
about
D
from
 Psychological studies show that some people are quick-tempered _____.
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A
at heart
B
on purpose
C
in person
D
by nature
Nothing is so easy as ________ parents to raise their expectations of their children too high.                                                             (2012·福建，33)
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A
of
B
to
C
by
D
for