单项选择题

______ difficulties we may have, we must finish the task as required.

A．Whatever
B．Whichever
C．Of which
D．No matter how
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单项选择题
A．BecauseB．AsC．Due toD．For
A．Because
B．As
C．Due to
D．For
单项选择题
A．helpB．supportC．assistanceD．aid
A．help
B．support
C．assistance
D．aid
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