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Tom looked upon the test as an obstacle _____ his classmates regarded it as a challenge.
#31299
A
while
B
because
C
unless
D
if
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Nobody could be sure____ Mr Goldman did it so well.
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Is this the reason____ at the meeting for his carelessness in his work?
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I will carry out the plan _____ there is much difficulty ahead.
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as if
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or
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