单项选择题

Bill 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
On January 1st many people make a New Year ______.
A. intention
B. determination
C. dedication
D. resolution
单项选择题
Crisis would be the right term to describe the ______ in many animal species.
A. abolition
B. restriction
C. descent
D. decline
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