单项选择题

Craig assured his boss that he would ______ all his energies in doing this new job.

A．call forth
B．call at
C．call on
D．call off
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单项选择题
A．pioneerB．settlersC．immigrantD．ancestors
A．pioneer
B．settlers
C．immigrant
D．ancestors
单项选择题
How did Nathaniel Bacon die
A．He was killed by Indians.
B．Governor Berkeley had him hanged.
C．He died of malaria.
D．He was accidentally shot by one of the farmers.
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