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
My new watch cost me ______ the one that I bought last time.
A．times three
B．three time as much as
C．three times more than
D．as much three times as
单项选择题
I ______ the book. I may well borrow one from the library.
A．need to have bought
B．need have bought
C．needed not bought
D．needn't have bought
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