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. He removed the tree ____________ it was the best in the ground.
#34778
A
when
B
if
C
because
D
as
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Sorry to say it will be years _______ we really have classes here with only 25 students.
#31432
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since
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This approach, ______ more expensive than the basic one, provides us with considerably more usage flexibility.
#31500
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More than 100 students have entered for the competition and   gains the most points will be the winner. 
#30609
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____ he has made up his mind to do something, nothing will stop him.
#33604
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We are worried about ____ they can be rescued.
#34249
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that
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whether
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if
D
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