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Before the meeting, Jack went over the report again ______ a mistake might occur.
#31902
A
while
B
in case
C
so that
D
even if
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He waited ________ the volcano became quiet and he was able to return two days later.
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when
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 Helen has just heard the news from her father ________ her boyfriend David will come back soon.
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After
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Before
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When
D
As