(2013·乌鲁木齐高三第一次诊断性测验)If we work with a strong will, we can overcome any difficulty, ________ great it is.
#30542
A
what
B
how
C
however
D
whatever
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since
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when
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I cannot hear the professor clearly as there is too much noise ________ I am sitting.
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before
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even if
B
in case
C
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D
that