单项选择题

It is I who ______ to blame for the mistake.

A．is
B．am
C．be
D．were
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单项选择题
Peter was very glad to know that his creditor generously agreed to ______ all of his debts.
A．take away
B．cut out
C．clear up
D．write off
单项选择题
This bestseller is well worth ______.
A．to read
B．reading
C．to be read
D．being read
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