单项选择题

The young man assured the boss that he would ______ all his energies to do the job well.

A．call on
B．call forth
C．call at
D．call off
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单项选择题
Mr. White holds a very important post with the company, but he is never ______ about what he eats and wears.
A．peculiar
B．particular
C．specific
D．special
单项选择题
Have you anything to say ______ the proposal
A．with regard to
B．in contrast to
C．on behalf of
D．for the purpose of
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