单项选择题

Human beings differ mostly from all other animals in that they have the ability to ______ tools.

A．employ
B．tackle
C．deal
D．utilize
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单项选择题
We might have missed our connection______ the clever arrangement of our guide.
A．in
B．but for
C．with
D．except for
单项选择题
Parents have a legal______ to ensure that their children are provided with efficient education suitable to their age.
A．impulse
B．influence
C．obligation
D．sympathy
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