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 Thanks _____ your help.
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to
B
of
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for
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at
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The engineer was _______arrest _______murder.
#48318
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on; with
B
under; with
C
under; for
D
in; for
Sally has been swimming ______ four hours.   
#50710
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for about
B
since
C
about
D
/
They will build nature reserves _____ protect ______ birds.
#48370
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to; in danger
B
for; endangered
C
to; endangered
D
for; in danger
Please be quick, or we will have no time ____ have lunch.
#50653
A
to
B
in
C
on
D
/
Mr.Lee will be happy because he will have tickets       Titanic.
#48159
A
to
B
in
C
on
D
under