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 He made a mistake, but then he took action to change the situation ________ it got worse.
#47055
A
until
B
when
C
before
D
because
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My parents are going to Shanghai _________ Monday morning.
#49140
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at
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in
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All the kids had a lot of fun ________ Children’s Day. They sang and danced happily all day. 
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in
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 Mickey Mouse was the first cartoon  _______ sound.
#47731
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and
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#47567
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to
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for
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#50247
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for
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about
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with
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of